User talk:Cyp

From formulasearchengine
Jump to navigation Jump to search

da:Brugerdiskussion:Cyp

Olá. Hello. Hej. سلام


Apropos "ti" and "tiself", have you tried the google mirror?

   http://www.alltooflat.com/geeky/elgoog/

Egil

)CTU( 3002 ,61 raM 65:22 pyC پيسك ...etis ynnuf a s'tahT

A bootleg means it's a live album. Look from here on the history of Live At Bonds by The Clash. - No-Fx

Wrong again. a bootleg means a pirated release or released unofficially, usually without the artist's permission. Many live albums are officially released (not bootlegs). Many bootlegs arn't live (eg, unofficially released studio sessions, etc). You still haven't explained what a 'bottleg' is though. quercus robur 22:03 22 May 2003 (UTC)

Hi: for the reason we are deleting all of Michael's edits regardless of their content, see User talk:Michael/ban. Regards, The Anome 15:16 6 Jun 2003 (UTC)

Actually noticed that page before... Seems to be a lot of mentions to it throughout the Wikipædia... كسيپ Cyp 15:21 6 Jun 2003 (UTC)

In case you didn't already know, I've created a group watchlist of sorts at Wikipedia:Favorite pages of banned users to help with tracking when Michael is vandalizing (and any future vandals like him). So feel free too use it, I have already found it helpful, and please add to it when he vandalizes more. Thanks. MB 22:11 6 Jun 2003 (UTC)


Congratulations, you have just been made a sysop! You have volunteered for boring housekeeping activities which normal users sadly cannot participate in. Sysops basically can't do anything: They cannot delete pages arbitarily (only obvious junk like "jklasdfl,öasdf JOSH IS GAY"), they cannot protect pages in an edit war they are involved in, they cannot ban signed in users. What they can do is delete junk as it appears, ban anonymous vandals, remove pages that have been listed on Votes for deletion for more than a week, protect pages when asked to by other members, and help keep the few protected pages there are, among them the precious Main Page, up to date.

Note that almost everything you can do can be undone, so don't be too worried about making mistakes. You will find more information at Wikipedia:Administrators, please take a look before experimenting with your new powers. Drop me a message if there are any questions or if you want to stop being a sysop (could it be?). Have fun! --Eloquence 13:39 20 Jun 2003 (UTC)

Thanks.
Hmmm, now I know how people managed to revert the Michæl articles faster than me sometimes... كسيپ Cyp 17:00 22 Jun 2003 (UTC)

I've rewritten Peg solitaire -- SGBailey 23:13 20 Jun 2003 (UTC)

Added statistics again, this time complete statistics, and of the correct board. كسيپ Cyp 08:10 21 Jun 2003 (UTC)

Hi! Thanks for your endorsement! I really appreciate it! Poor Yorick 22:55 22 Jun 2003 (UTC)


Hi, I deleted the Apostrophe' article. It was by hardbanned user Michael, using his newest identity, Unbanned user. All contributions by hard banned users should be deleted on sight irrespective of content if only by them, or reverted to another user's work if another user worked on the article before them. As Michael was the originator of the article and so there was no earlier work to revert to I have deleted it. I am letting you know because you made some later changes, not realising it was Michael's work. Basically keep an eye out for music articles written by a new article. They are almost invariably in the form of details of an album. If you have any doubt, check the user's main page - if he is believed to be Michael someone will usually have placed a note to that effect on his page. If in doubt, check the vandalism page to see if he is listed there under that new name. Michael's edits are notoriously unreliable (he mixes fact with stuff he makes up) but even if they were 100% accurate, if by a hardbanned user they should be binned on sight. lol FearÉIREANN 18:42 5 Jul 2003 (UTC)

It was the first edit by that user, so I could only be 99.975412% sure it was him, so couldn't just go deleting. Therefore I just checked all of the article for "mistakes". Found a "b" instead of "B", which he corrected himself anyway, "Apostrophe" instead of "Apostrophe'", which didn't seem important, but I corrected, and a date that was the same as other sites said, but other sites also said the date wasn't completely certain, which I added to the article, don't know if that counts as a "mistake". At the time, there wasn't any talk page, or user page.

NP. :-) FearÉIREANN 22:37 5 Jul 2003 (UTC)


hello,


er, is it common practice in a discussion about banning someone that this "someone" vote is taken into account? Say, if decisions are taken upon full consensus only, and a blocking vote is enough to prevent the ban, if Lir says he is against him being banned, he then will not be ? :-) User:anthere

Actually, I just assumed RK would be against banning himself, not sure if I actually checked that he stated he was against the ban. Anyway, I'm pretty sure 1 vs 6/7 isn't quite enough for a ban, so probably doesn't matter whether RK's vote is taken into account. كسيپ Cyp 22:00 9 Jul 2003 (UTC)

Hi,

I seem to have sorted out the problem with these odd characters. They get broken with Lynx. And I must use Lynx. The solution seems to be to put Linux console in unicode mode and change Lynx options accordingly. I have been just experimenting with editing the offending parts of text with Lynx and now it looks OK. I sometimes forget to put the console into unicode mode and this might occasionally happen. Besides Lynx does not show the characters specially they are just "aa" letters before and after editing with Lynx, so it's harder to spot somthing is broken.
--Kpjas 17:45 9 Jul 2003 (UTC)

Well, good it's possible to get it to work... Browsers can do strange things sometimes... كسيپ Cyp 22:00 9 Jul 2003 (UTC)

Thanks for cafe wall illusion :) Regards. -- sannse 21:40 9 Jul 2003 (UTC)

No problem, it was already there, anyway. (In french, at least.) Most of the editing done by other people, too. كسيپ Cyp 22:00 9 Jul 2003 (UTC)

No problem with the link added to Randi's entry.
- Lord Kenneth


I am very willing to go over either New Imperialism version with you - I think its very important that somebody read these. This is an important part of history, a result of the industrial revolution and a cause of the World Wars. Pizza Puzzle

Unless someone else reads them first, and somehow changes all the sentences into mathematical statements, I think it's better if someone else looks at them instead. A spell checker could understand them better than I could. כסיף Cyp 08:21 24 Jul 2003 (UTC)

Thanks very much for the page-moving tip! I appreciate the help. Jwrosenzweig

No problem, glad to be of help. כסיף Cyp 21:52 24 Jul 2003 (UTC)

my article is neither intended only for laymen, nor is it a summary -- mine is a FULL article Pizza Puzzle

Sorry, I just assumed it was supposed to be a summary, because it was shorter, and I read someone saying it was for laymen, guess it wasn't you that said that, then. כסיף Cyp 16:05 25 Jul 2003 (UTC)

Absolutely not, 172 argues that it is "for laymen" so that he can pretend to be an expert and argue that his version is somehow superior. READ HIS ARTICLE -- ALL OF IT I guarantee you, that regardless of your knowledge on the subject, it will become overwhelmingly apparent that this article is not wikified and needs an overhaul. The article is cut and pasted together, repetitive, POV, rambling, and frequently off topic. It is also way past the 32k limit. I also guarantee you that you will not be able to read his entire article - its an abomination that will give you a headache.

I can't read more than a few sentences of either article, before the words stop making sense. Even if the articles were perfect, I still couldn't make any sense of them. I don't even understand the title. I am not disagreeing with you, simply stating that I have no way of telling the difference between a masterpiece on the subject and computer-generated ramblings. כסיף Cyp 09:49 26 Jul 2003 (UTC)

My article is not a summary, it is a complete rewrite and it should replace the older article. Pizza Puzzle

The article was almost entirely written by one user, who has reacted with extreme passion to any attempts to change the article. He actually protected the page after I made a link from a word to an article! Pizza Puzzle

I may have found a few of his actions a little odd. כסיף Cyp 09:49 26 Jul 2003 (UTC)

I liked Truncated dodecahedron, but you'll never get away with it: jimfbleak

Been 6 days, thought it would last about a minute before someone replaced it... Was wondering if anyone noticed... Ксйп Cyp 15:54, 3 Aug 2003 (UTC)

I just noticed; I don't have the heart to kill something that amusing. Cyan 05:08, 5 Aug 2003 (UTC)


I see you've changed your byline to Cyrillic characters. I'd like to inform you that the four Cyrillic characters you have there are all consonants. Remove the diacritic mark, and then you'll have something that may correspond to your actual nickname, depending on how you really pronounce it. -Smack 06:20, 5 Aug 2003 (UTC)

Thanks, I thought й was just supposed to be a shorter и. Was meant to be somewhere between Cip and Ceep, maybe a tiny bit of oo, but I'm not sure. Come to think of it, y is sometimes considered a consonant in English, too, although it's probably not normally pronounced like that... Will probably be changing to Κσυπ after a while. Ксип Cyp 08:24, 5 Aug 2003 (UTC)
Yeah, it is called "short", but it actually represents the "y" sound in "boy." -Smack 21:54, 5 Aug 2003 (UTC)

Hello. Responded to your comment on User talk:163.1.242.5. Please see that page. Many thanks.


Dear Cyp, i put that notice, because i started to post nonsense pages in Wikipedia:Deleted test to avoid filling Votes for Deletion with unecessary junk. Cheers, Muriel Gottrop 12:13, 6 Aug 2003 (UTC)

I know, think changing pages into redirects is easier than putting them on Votes for deletion, when they just contain only obvious junk like "jklasdfl,öasdf JOSH IS GAY". (In theory, isn't even nesseccary to list on the actual Deleted test page, as they appear under what links here, anyway.) Think the Deleted test page would be used more, if most of the people that would have used it hadn't turned sysop. (See Wikipedia:Requests for adminship.) Ксип Cyp 13:41, 6 Aug 2003 (UTC)

When RK comes back I want to nominate him for sysop (again) I dont ask for much, but I ask that you support his nomination. Sincerely-戴&#30505sv 23:24, Aug 16, 2003 (UTC)

I would have, but I was in Brazil at the time, and didn't see this request. Ксип Cyp 21:04, 2 Sep 2003 (UTC)

Hello,I saw your name in the page history as a recent edit in the following context, am hence trying to clarify something. I just read the page 'Pattern Language' following a link from architecture. It is totally about something else altogether except for first two paras. Pattern language related to architecture is about design process. Is there some other pattern language related to computers?If so I will rewrite the initial part as a separate section with a dividing line or create a separate pageKRS 13:35, 27 Aug 2003 (UTC)

Not exactly recent history (note the month), anyway, I don't know anything about the subject, I just reverted something which seemed to me, to be a joke. Ксип Cyp 21:04, 2 Sep 2003 (UTC)

Please voice your opinion on deletion.

21st Century Transcendentalism is not a religion and does not advocate (request belief, membership or anything else) anything; it stands for religious rationality in the 21st Century. If Wikipedia can describe what atheists, Christianity, Islam, Bokononism thinks then why can not I as a 21st Century Transcendentalist describe what I think? Bias, maybe?

“Transcendentalism Today Org.” with Kurt Kawohl as its founder has been accepted by and is a member of: IONS - Institute of Noetic Sciences, World Interfaith Congress, United Communities of Spirit, Alliance for Spiritual Community, Interfaith Voices for Peace And Justice, user:kkawohl

Just came back from Brazil, suppose the page has already been deleted. Ксип Cyp 21:04, 2 Sep 2003 (UTC)

I suggest include in the keyboard layout the US keyboard, because is the used in the booting of Linux .

I've just added the US keyboard layout too, now. Κσυπ Cyp 21:26, 23 Oct 2003 (UTC)

And the German-nodeadkeys too. You can see a link in the bottom of the page, because the german is the used by Gnoppix Linux, when Gnome is loaded - the default keyboard in Gnoppix. Thanks in advance.

I'm not sure what a "nodeadkey" is... As for the rest of the keyboard, I can't upload it at the moment... Either I've been banned from uploading images (unlikely, since I still have sysop access), or there is some problem with images at the moment... Κσυπ Cyp 19:01, 26 Oct 2003 (UTC)


Thanks for the nomination. It is encouraging to find that one's efforts have been appreciated. I guess now I find out how many Wiki enemies I've made over the last 6 months and 2000 edits. mydogategodshat 17:20, 30 Oct 2003 (UTC)


I suppose megalo plus anthus would give megalanthus rather than megaloanthus, but it is a fine point. :) Adam 01:38, 17 Nov 2003 (UTC)


<Insert sensible talk above this line only>
<Insert random vandalism below this line only>


As requested above... HOW QTZNY WODRUMPF. -- SGB


Thanks for fixing the [[[ ]] Bmills 17:42, 17 Nov 2003 (UTC)


I would like to express a heartfelt thanks to: Κσυπ Cyp , Cimon Avaro on a pogostick, snoyes, Adam Bishop , Secretlondon, Hephaestos , 207.189.98.44 , Jamesday, Pakaran for nominating me and supporting me. It is encouraging to know that my efforts over the past 6 months have been appreciated. I prize your actions all the more knowing that many of you were not familiar with my work and had to do some research to decide whether to support me or not (because I limit my contributions to the 750 business/economics articles) . Thank you for the time, the effort, and the confidence.

There was a minority that did not support me because of my name. It seems that half have a problem because they read “shat” into it and half because of the word “god”. I find this amazing. The people that read “shat” into the character string had to ignore the commonly used word “hat” and pick out a word that has not be in common use for more than a century. My spell checker is currently telling me that the word dosn’t exist. One complainant insisted on converting “Monad” into “gonads” and “Excrescent” into “excrement”. Another saw “a dog eating a bone” as a sexual act. All I can say to these people is “Get professional help”.

As for changing my name, I have decided not to do that for two reasons. One is a philosophical reason. For an explanation, read The Crucible, particularly where John Proctor declares the importance of your name. The price of adminship is too high. The other reason is a practical one. I find it useful to use the same name on all my online activities. It is interesting that two universities and several commercial sites don’t have a problem with my name. Maybe it is not all that surprising since they are not inhabited by trolls trying to forward their cause.

Hope to see you around the business/economics pages in the future. mydogategodshat 03:02, 22 Nov 2003 (UTC)


Hi - just to let you know that I have posted an answer to your question at Wikipedia:Reference Desk#Symmetry groups -- Gandalf61 16:10, Nov 22, 2003 (UTC)


Hi - I was previously unaware of the feeding habits of the Truncated dodecahedron; thanks for filling me in! Alas, it seems the information has been removed from the current article, but that's how things go I suppose... --Delirium 02:35, Nov 24, 2003 (UTC)

Dear Cyp, just to tell you that i'm keeping the original version of the truncated dodecaedron in my user page. It's to funny to be lost! Cheers and keep the good work! Muriel Victoria 14:20, 24 Nov 2003 (UTC)

Cyp - I agree re: mydogategodshat. Secretlondon 13:16, Nov 29, 2003 (UTC)

Hi Cyp, please see this dif for comment re. mydogategodshat. Regards -- sannse 14:02, 29 Nov 2003 (UTC)

Re nomination: I think he definitely should be nominated again at some point, although I don't think I should be the one to do it, preferably someone who works on more articles with him. My first thought was that it might be too soon, but on second thought maybe it would be good to strike while the iron's hot. - Hephaestos 14:28, 29 Nov 2003 (UTC)

Glad people are supportive of re-nomination... Was worried that everyone might just forget about it, which would be a shame... Κσυπ Cyp   15:21, 29 Nov 2003 (UTC)

After the person that I had added to desysop actually supported my nomination(eloquence) i removed him. THanks for the concern and happy wiki-ing! Alexandros


I'm (snoyes) moving your question on the reference desk here in case you want to keep a copy of it:

Symmetry groups

The symmetry groups of the archimedean solids snub cube and snub dodecahedron are like the symmetry groups of the cube and the dodecahedron, just without the reflections. Would those groups be called "O" and "I"? (Instead of "Oh" and "Ih"?) Κσυπ Cyp   14:43, 22 Nov 2003 (UTC)

Yes - the symmetry group of the snub cube is "O", and the symmetry group of the snub dodecahedron is "I" - see octahedral group and icosahedral group at MathWorld. -- Gandalf61 16:06, Nov 22, 2003 (UTC)
Thanks. Seems they even have the coordinates for the snub cube there (but not at their actual snub cube article)... Wikipedia is still the only site I know of that has the exact snub dodecahedron coordinates (without having to solve a degree 6 polynomial), though. (Up to mirrors of Wikipedia) Κσυπ Cyp   17:50, 22 Nov 2003 (UTC)

User talk:MediaWiki default made me laugh. Maybe you should welcome User:Conversion script too. She seems to have made a lot of contributions. :) Angela. 23:33, 5 Dec 2003 (UTC)

Hexadecimal - thanks for your explanation. I had an intuitive sense of which decimals terminated, and a professor explained it to me, but I never really "got it". Pakaran 09:01, 11 Dec 2003 (UTC)

Jupiter moons

Thanks for correcting number of moons under 39. I had outdated information (World Book Almanac 2003) and I should have doublechecked with another source. -- Anonymous User

Special:Wantedpages

It already has done. :) Angela.

Meister-Bafög


The official name of Meister-Bafög is AFBG (Aufstiegsfortbildungsförderungsgesetz). Try this machine-translated governmental web page: http://babelfish.altavista.com/babelfish/tr?url=http%3A//www.bmbf.de/252_3440.html&lp=de_en 82.82.127.8 23:50, 13 Jan 2004 (UTC)

Tried machine translating a lot of pages already... Anyway, thanks, I think I've got an answer now.   13:28, 14 Jan 2004 (UTC)

Your handle reaches unfathomed heights of silliness. :) Does that mathematical expression actually mean anything? -Smack 22:26, 14 Jan 2004 (UTC)

π is about 3.1415926535897932384626433832795028841971693993751058209749, and the way C, y and p are used, I suppose {C,y,p} is some kind of vector. I'm not sure what the Κ, σ and υ are. Doubt it's quantum mechanics, because there isn't any in there anywhere... I'll have to meditate on myself for a while. I hope I'm some new interesting physical law that hasn't been discovered yet...   22:39, 14 Jan 2004 (UTC)

Wikibooks admin app

Sorry it took so long, but you are now a Wikibooks admin. Use your new powers for good and resist the temptation of the dark side. ;) --mav 10:46, 7 Feb 2004 (UTC)

Hadn't looked there for a while... Anyway, now there's a more legible MediaWiki:Loginend article there. Κσυπ Cyp   16:17, 7 Feb 2004 (UTC)

You're wonderful

I just wanted to thank you for all your help with the computational geometry stuff on the reference desk. I still haven't quite accomplished what I need to do, but I'm getting there. In case you're wondering what the heck I need all these intersections of planes & 3D-solids for, I'm trying to rewrite some classic 1950s code that finds the linear supersonic theory approximation to airplane wave drag. moink 04:13, 13 Feb 2004 (UTC)

You're welcome. Κσυπ Cyp   18:56, 22 Feb 2004 (UTC)

Request for Comments on Plautus satire

Your comments are requested on Wikipedia:Requests for comment/Plautus satire. →Raul654 05:14, Feb 19, 2004 (UTC)

Vote added to "straw" poll there (on 19th feb). (Haven't been following what's happening carefully.) Κσυπ Cyp   18:56, 22 Feb 2004 (UTC)
Would you consider checking the situation out again? silsor 20:38, Feb 23, 2004 (UTC)

Autoblocks always last for 24 hours after the last logged-in page view. -- Tim Starling 13:11, Feb 22, 2004 (UTC)

That seems to be correct, although I had expected it would be shorter than 24 hours, if the regular block also would expire in less than 24 hours. (I asked about it before I saw your message here.) Κσυπ Cyp   18:56, 22 Feb 2004 (UTC)

Hi Cyp! At WikipediaNL we are checking all images that don't mention copyrights. Everyone checks his/hers own uploads. Some time ago I uploaded image:resistors.jpg that you uploaded on EN. I would like to know what the copyright-status of this image is, so that we can be sure we can use it on NL. Is it your own picture and released under GNU? Please respond at nl:Overleg gebruiker:Fruggo. Thanks! Fruggo 13:41, 27 Mar 2004 (UTC)

Thank you for your speedy answer! Fruggo 19:55, 27 Mar 2004 (UTC)

You're welcome... Κσυπ Cyp   20:03, 27 Mar 2004 (UTC)

redgreen.png

Moved to Talk: Color blindness.

From a fan

I haven't seen you around a while, until now, which I thought was a shame! Your Wiki-work (+Wikibooks stuff) is always great, so keep up the good work you do :) Dysprosia 05:52, 9 Jun 2004 (UTC)

I have been checking my watchlist a few times a day, though. Had a couple of exams, one left. Κσυπ Cyp   06:02, 9 Jun 2004 (UTC)

Dodecahedron.gif

Nice spinning goombah! --Gary D 10:25, 9 Jun 2004 (UTC)

Them There Purdy Shapes

I can't lavish enough praise on you for those damned beautiful shapes you've created. Jolly good work! By the way, I'm VascoDaGama from #wikipedia.

Again, jolly good work! DO'Neil 11:14, Jun 15, 2004 (UTC)

re: blocking vandals

In the future, when blocking usernames that are part of the vandal-bot problem we are having these days, please block them indefinitely. thanks! :) Kingturtle 17:40, 17 Jun 2004 (UTC)

Gaussian

Hello. I notice that in Box-Muller transform you spelled Gaussian with a lower-case g. Is that because you feel that if Abel is honored by the lower-case initial in abelian, the Gauss should be as well? Or just habit? Do you have some position on this usage issue? Michael Hardy 18:21, 19 Jul 2004 (UTC)

Habit, probably. I hadn't actually thought about capitalisation. Κσυπ Cyp   10:27, 31 Jul 2004 (UTC)

Dvorak Keyboard

If you have time, would you consider making images of the Dvorak Simplified Keyboard to be added to Keyboard layout?

Darrien 18:20, 2004 Jul 11 (UTC)

I'm a bit tired of Internet Exploiter, and should probably some time try to find a type-of-computer-independant way of making keyboards that look the same... Given my experience with Microsoft stability, I consider it not entirely unlikely that future versions of Internet Exploiter would spontaneously decide to render the keyboards upsidedown with green on pink in the Symbol font... Κσυπ Cyp   10:27, 31 Jul 2004 (UTC)

License?

Hi, on french wp we use your pic Image:Redgreen.png and I'd like to know the exact license. Is it GFDL ? Thanks in advance Tipiac 11:54, 13 Aug 2004 (UTC) (please reply on my discuss page).

n!!

I can't make sense of that at the moment, maybe I'm too sleepy... As far as I can tell, . Κσυπ Cyp   00:08, 4 Sep 2004 (UTC)

What you're not making sense of is the word where. The notation n!! does not mean the factorial of the factorial of n, but rather it means what it says it means after the word "where". That's what "where" means in this kind of mathematical jargon. The notation is obnoxious because n!! ought to mean the factorial of the factorial of n, but this and similar notation seem to have some currency. Michael Hardy 02:08, 5 Sep 2004 (UTC)

PS: I'd write

rather than

Name

Reply is on My talk page. Nice polyhedra. Good day. Ilγαηερ (Tαlκ) 21:39, 2 Aug 2004 (UTC)

)CTU( 4002 guA 2 ,93:12 )κlαT( ρεηαγlI .yad dooG .ardehylop eciN .egap klat yM no si ylpeR

Chebyshev polynomials

Many thanks for the graph. I had hoped me edits would lure you on the page and you would create a second graph ;) I do not know the application of chebyshev polynomials of the second kind either. I only know they are closely related to the first kind and that the first kind is used to construct a best polynomial approximation.MathMartin 21:13, 15 Sep 2004 (UTC)

Recent edits

Thanks for the very illustrative image for Lagrange polynomial. It should make the material much clearer. As for your edits on Divided differences and Newton polynomial, they were correct. The errors you corrected were mine.MathMartin 12:28, 21 Sep 2004 (UTC)

polyhedron images

Hi Cyp,

I noticed that someone had started a listing Wikipedia:List of images of GFDL/GPL/... images. So I started a polyhedron listing Wikipedia:List of images/Math Diagrams/Polyhedra within the "Math diagrams" (should be "Mathematics", but whatever) to include those we created a while back. Then I did a 1,$s/.../.../ on the list from your homepage, a |sort and a manual tweak. If I have missed any, feel free to add.

Cheers, Andrew Kepert 03:33, 25 Oct 2004 (UTC)

Added a couple of antiprisms and a trapezohedron. Apart from them, don't remember any other polyhedræ. Κσυπ Cyp   2004年10月25日 (月) 12:01 (UTC)
Hi again Cyp. Just letting you know that I have been modding Poly.pov to churn out some Johnson solids. See Talk:Johnson solid for progress (23 done, I think) and User:AndrewKepert/poly.pov for source. ... and if you could tell me how to get the image upload widget to accept a .pov file, it would be appreciated. --Andrew Kepert 09:02, 3 Nov 2004 (UTC)
I saw that somewhere a few days ago (thought there were 5 or so at the time, but can't remember), was thinking I should look at it to see how it's done, and see if there's a more efficient way... Just had an exam today, maybe I'll actually have time to look at it properly, soon. Doesn't it say "Warning: .pov files are not a recommended format, save anyway?", where you can click on "save anyway"? If the system doesn't accept .pov files any more, try changing it to a .npov file. I thought about the problem a few months ago (or whenever I finished the Catalan solids), but couldn't think of a "neat" way of doing it, "neat" meaning automatically finding the coordinates for all the solids without some kind of repeated approximation. No promises, but maybe I can take a look soon. Κσυπ Cyp   22:51, 3 Nov 2004 (UTC)
Ah yes, I forgot - Wikipedia prefers .npov to .pov 8-) I didn't see the "save anyway?" link, so either I have link blindness or it is no longer available. I will check next time. As for the J solids, I have mainly been doing what Johnson referred to as "Cut and Paste" solids, and doing them in batches of similar solid. Low hanging fruit. The half-dozen or so genuinely new ones (hebesphenomegacorona(?) et al) I am thinking about. The coords are algebraic, but this doesn't mean much. It is probably easiest to use a "ball and spring" simulation to solve for the coords. ... or find the coords somewhere else (no challenge). Andrew Kepert 04:23, 4 Nov 2004 (UTC)

Polyhedral nets

Hi Cyp,

I just noticed where you have been inserting nets (flattened skins) of polyhedra here and there. With these, it is probably best to add a caption or explanation on what the image is. Does a page net (polyhedron) or similar exist? If not, it should, and you could put on each image a caption like "The net of the fubarahedron". (Ref: http://mathworld.wolfram.com/Net.html).

I have been thinking of using Wikipedia:Infobox templates for the polyhedron pages. My feeling is that the net of the polyhedron could be put in here. I will to look up how to create one of these.

Also I noticed that your images have heavier lines on the joins, presumably from being redrawn. Bug or feature?

Cheers, Andrew Kepert 00:52, 8 Nov 2004 (UTC)

Update - I have implemented two templates. See their use at Hebesphenomegacorona and Cuboctahedron. As I understand them, the templates don't have optional parameters (e.g. for most of the Johnson solids I don't think it is worth having a line for "dual" - this is not possible to disable) but there may be work-arounds using subtemplates and such. Too sophisticated for a first attempt. Also I think the template needs an "image caption" parameter (which could be blank) as your previous version of cuboctahedron page did have text there. Andrew Kepert 08:19, 8 Nov 2004 (UTC)
P.S. See User:AndrewKepert/polyhedra
The heavier lines on the joins were so it's easy to tell the difference between the edges and the joins. Also (actually the main reason) because it was easier to program that way. I inserted nets for all the platonic solids and archimedean solids. Think nets for the catalan solids would be harder to make. I was just throwing them in there, without worrying about layout. The last few were thrown in even faster, when I figured out how to use "{{subst:PAGENAME}}" = "Cyp" to save time.
How hard is it to make the remaining Johnson solids, compared to the ones already done? You seemed to be doing them so fast, that most would be done before I could program the program to sew up nets. In any case, I think I should make nets for them all, even if they can all be modelled without writing a program for it. I think there may be alternate ways of folding some nets, but folding starting folding from the corners with largest angles would probably work for most or all... Should be trivial to check how good a solution is, so should be relatively trivial to make a program for folding, just not sure if it would have a reasonable running time... Κσυπ Cyp   2004年11月11日 (木) 15:27 (UTC)
I got bored with the cut-and-paste polyhedra (I started more of these than I finished) and decided that the sporadic ones (J84-J92) were a bit more of a challenge. I will get back to the others. It was a bit weird programming that stuff in povray, but it works, so who is to argue? In terms of the nets, I was thinking whether it could be done in reverse, constructing a net from the polyhedron, maybe via a breadth-first search. Anyway, I have serious stuff to deal with, and may not get back to this for a bit. I have added a todo to User:AndrewKepert/poly.pov if you feel you want to move it along a bit. If anything, I may do J90-J92 on the weekend. Andrew Kepert 00:00, 12 Nov 2004 (UTC)

Blink

Could you please reconsider your use of blinking text in your signature? It is rather annoying… --fvw 12:49, 2004 Oct 25 (UTC)

thanks --fvw 15:34, 2004 Oct 25 (UTC)

Rice's theorem response

Hi, I noticed this rather ancient comment of yours on Talk: Rice's theorem:

Isn't it decidable if an algorithm halts after 3 billion steps? Can't you test it by running it for 3 billion steps? كسيپ Cyp 22:05 8 Jun 2003 (UTC)

This is a common confusion, and I added this paragraph to the article to help address it:

It is important to note that Rice's Theorem does not say anything about properties of machines, only of functions and languages. For example, asking whether a machine runs for more than 100 steps on some input, whether it has more than 5 states, or whether it ever moves its tape head to the left are all nontrivial but decidable properties. They are not properties of the language because it is possible to find two machines recognizing exactly the same language, one which has the property and one which does not.

In short, Rice's Theorem only applies if the property being decided is a property not of the specific machine but of the language recognized by that machine. Derrick Coetzee 06:55, 31 Oct 2004 (UTC)


I wrote that when there was an early, short version of the page. I don't think it was clear to me at the time, that it had nothing to do with actual implementations or actual turing machines. Κσυπ Cyp   22:51, 3 Nov 2004 (UTC)
Well, it's not exactly true to say it has nothing to do with actual Turing machines either. It is often stated in terms of deciding a property of a given Turing machine, and a property's nontriviality can also be defined in terms of recognizable languages. Deco 16:52, 4 Nov 2004 (UTC)


Quartic Equation

I made several remarks on Talk:Quartic_equation about your recent changes. I would be glad, if you could respond... Thx. --83.129.237.17 03:02, 13 Nov 2004 (UTC)

I would like to repeat my objections partially hereby. Thx. --83.129.175.32 02:53, 14 Nov 2004 (UTC)

Polyhedra

Hey, just want to tell the polyhedra pics are awesome. Great job man Btw, how you liked over here at Brazil? :P Kieff | Talk 00:30, Nov 15, 2004 (UTC)

Animated solids

I like the animated solids. How easy is it to slow them down? I feel we really need two versions - your current fast versions which give an overall impresion of the solids and a much slower version which allows you to inspect each view for a cople of seconds before stepping on. (Ditto the 4D 24-cell - did you do that one too?) -- SGBailey 09:02, 2004 Nov 18 (UTC)

Johnson solids

Hi again Cyp.

FYI - I have finished the Johnson solid images and stubs. Some work to be done, most of it relating to filling the infobox, but there are also some images to re-render. User:AndrewKepert/poly.pov is now current, although it is getting very crufty. I was thinking of changing the lighting/surface properties so that the Platonics were (say) red, the Archimedeans green, the catalans blue and the Johnsons yellow, but that would involve a major render and upload project. 8-P Since there are more J's than anything else, maybe they would stay green. I wish I had thought of this before I started.

I was hoping to get some feedback somewhere between rabid enthusiasm and outright digust regarding the infobox template - see User:AndrewKepert/polyhedra#Templatisation. In particular from the point of view of ease-of-edit, beauty and content. Another thing I have been experimenting with is forward-back browse links -- there are some stretches of the sequence implemented around J44 and J68. The main difference to your hand-coded tables is that I need to figure the best way to incorporate optional extra image links as you have used in places. Maybe another template variant is required.

Cheers, Andrew Kepert 08:40, 2 Dec 2004 (UTC)

Sorry, haven't really had much time lately to work on it... If you finished calculating all solids, then there's no point in me trying to finish my program to find the coordinates... (Not sure when I would have gotten around to finishing it, anyway.) Since I have a faster computer now, it should be possible to help render them in a realistic time-frame... Think rendering the default one (1024x1024 or whatever I rendered the platonics, archimedeans and catalans as) took about 10 minutes, can't remember. If there's some program for turning a mass of 24-bit colour images into an animated .gif, without user interaction, it would be more practical to make videos. Was going to make a program to crop the border, but didn't do that yet. Without using the automatic framing feature, will it render them all within equally sized unit spheres? (Perhaps a bit silly and pointless, but I prefer if they are all rendered identically like that.) I don't know whether or not me helping with rendering is useful - don't know if you have a supercomputer cluster or a 4.77MHz 80286 (might be what my first computer was)... (The new computer is an AMD64 3200+ (2211.087 actual MHz), 512 Mb memory.) Finding the coordinates of and rendering all 13 archimedean solids seemed like a lot of effort, and you just did 92 more solids somehow...
There's no outright disgust about the infobox template, so I guess it must be rabid enthusiasm. Easier to edit is better, and after making 92 pages, I expect that you know more than me about ease of editing. Appearance was the same as before, I think (haven't looked carefully for details). As for making extra image links or having variations, think I've seen something like {{boxstart}}{{somesection}}info about something{{nextsection}}info about next thing{{boxend}}, or something like that, with a rather broken-up template. Κσυπ Cyp   20:21, 4 Dec 2004 (UTC)
Been busy too. Annoying how real work gets in the way sometimes.
I was doing smaller (5122) renders as I didn't see much point in going bigger - more upload bandwidth, more wiki server storage and resize overhead. On my mac (G4 1.25GHz x 2 IIRC) they are pretty quick, and it is easy to run several instances of it (from a shell) then go away and do something else. They only use about 2 MB RAM each, so they don't thrash. Actually some of my renders were done on a much slower machine - 300MHz or 350MHz - while I was working on something else. I cheated a lot with the coords - you provided most of them (there are something like 13 variants of the rhombicosidodecahedron). I just wrote workable macros to cull vertices, cull, offset and twist half-spaces, add caps (pyramid/cupola) and the optimise() routine to handle the sporadics. I felt a couple of times like diving in and making the growing mess of code more elegant, but this desire never reached ignition point.
The easiest way to convert a stack of images down to a gif is ImageMagick (under linux or similar). However, I think animated gifs really suck for this sort of thing - inefficient and no playback control. A proper movie format compresses better and would mostly render in browser with playback controls. mpeg is handled by most players, and ImageMagick can encode (or mpeg_encode). I think ImageMagick will even crop for you.
Yes, on skimming the template spec I saw that there were some hacks to make optional sections work - I couldn't see much sense in it so I kept away. What is really needed within the templates is "#ifdef foo ... #fi" and "#ifndef bah ... #fi". The benefit of the template is the ability to make uniform changes. In the end I was not editing those pages anyway - they were coming straight off a spreadsheet. I have to go back and hand-edit things like symmetry groups and relationships between Jn's. I also will go through and tidy load of uniform stuff some anonymite dumped on every page at the 3/4 complete stage instead of either (a) waiting until I had finished or (b) putting on the Johnson solid page - oh well.
Finally I don't care much about bounding spheres, but they make sense if you are rotating. My autoframing basically ignores them. Have you considered rotating on an axis of symmetry so that you only need a fraction of the frames? Andrew Kepert 01:38, 7 Dec 2004 (UTC)

Article Licensing

Hi, I've started a drive to get users to multi-license all of their contributions that they've made to either (1) all U.S. state, county, and city articles or (2) all articles, using the Creative Commons Attribution-Share Alike (CC-by-sa) v1.0 and v2.0 Licenses or into the public domain if they prefer. The CC-by-sa license is a true free documentation license that is similar to Wikipedia's license, the GFDL, but it allows other projects, such as WikiTravel, to use our articles. Since you are among the top 1000 Wikipedians by edits, I was wondering if you would be willing to multi-license all of your contributions or at minimum those on the geographic articles. Over 90% of people asked have agreed. For More Information:

To allow us to track those users who muli-license their contributions, many users copy and paste the "{{DualLicenseWithCC-BySA-Dual}}" template into their user page, but there are other options at Template messages/User namespace. The following examples could also copied and pasted into your user page:

Option 1
I agree to [[Wikipedia:Multi-licensing|multi-license]] all my contributions, with the exception of my user pages, as described below:
{{DualLicenseWithCC-BySA-Dual}}

OR

Option 2
I agree to [[Wikipedia:Multi-licensing|multi-license]] all my contributions to any [[U.S. state]], county, or city article as described below:
{{DualLicenseWithCC-BySA-Dual}}

Or if you wanted to place your work into the public domain, you could replace "{{DualLicenseWithCC-BySA-Dual}}" with "{{MultiLicensePD}}". If you only prefer using the GFDL, I would like to know that too. Please let me know what you think at my talk page. It's important to know either way so no one keeps asking. -- Ram-Man (comment| talk)

RFC pages on VfD

Should RFC pages be placed on VfD to be deleted? I'm considering removing Wikipedia:Requests for comment/Slrubenstein, Wikipedia:Requests for comment/Jwrosenzweig and Wikipedia:Requests for comment/John Kenney from WP:VFD. Each of them was listed by CheeseDreams. Your comments on whether I should do this would be appreciated. - Ta bu shi da yu 03:30, 10 Dec 2004 (UTC)

I like your style

I need some more of your magic. Would you consider taking a little peek at subtractive color I know it's messy, but I'm trying. let's dance together. --Dkroll2 00:27, Dec 29, 2004 (UTC)

Unverified image

Hi! Thanks for uploading the following image:

I notice it currently doesn't have an image copyright tag. Could you add one to let us know its copyright status? (You can use {{gfdl}}: {{gfdl}} if you release it under the GNU Free Documentation License, {{fairuse}}: {{fairuse}}if you claim fair use, etc.) If you don't know what any of this means, just let me know at my talk page where you got the images and I'll tag them for you. Thanks so much. Denni 04:23, 2004 Dec 13 (UTC)

P.S. You can help tag other images at User:Yann/Untagged_Images. Thanks again.

I've written a clarification at the talk page (I scanned it myself). I'm unsure whether DRoA has any rights at all (including the right to exist), and think it's likely to be {{PD}}. Κσυπ Cyp   17:22, 13 Dec 2004 (UTC)

Stenography images need copyright tags too

Somebody labeled the "stenography" images you did for Steganography as unverified. Would you midn adding a tag to those, too? Lunkwill 04:17, 13 Jan 2005 (UTC)

Pic of the Day - Wikipedia:POTD/January 26, 2005

Hi Cyp,

Just to let you know that your animation of Pentakis dodecahedron is up for Pic of the Day again on the 26th Jan. I've reused the previous description, but you might want to check the caption at Picture of the day/January 26, 2005. -- 22:06, 21 Jan 2005 (UTC)


I can't stand the mystery!! :o)

I like your color blind tests, but for those of us who they "work" on (I can't see like half of them) it would still be interesting to see what the actual numbers in the pictures were! Would you mind adding the number to the image discription pages?--Deglr6328 06:38, 25 Feb 2005 (UTC)

Thanks! :)--Deglr6328 23:15, 26 Feb 2005 (UTC)

Image:Rubik444.jpg

Image:Rubik444.jpg is currently tagged as unverified, but your other Rubik's image, Image:Rubik.jpg is GFDL, can Rubik444 be tagged GFDL as well? Boffy b 10:27, 2005 Mar 15 (UTC)

Thanks for fixing 64-bit!

I'm not sure how it was possible for me to overlook the template! Thank you so much for the fix! By the way, nice polyhedra... I'm impressed! Shinobu 22:14, 6 Apr 2005 (UTC)

Images

I hereby award you the Great Images Imaginary Award that I Just Made Up. Do you have a gallery? Wikipedia:Wikipedians/Graphic Artists - Omegatron 19:48, Apr 15, 2005 (UTC)

Colour bar on cone response image.

Hi, I have used your Spectrum image Image:Spectrum441pxWithnm.png to make a colour bar for Image:Cone-response.png. Could you have a look and see if it all right. I'm no color expert so I want a check. Zeimusu | (Talk page) 10:15, 17 Jun 2005 (UTC)

Comparing, the colours don't seem to match. (498nm appears cyan in my image, and green in the image with the colour bar.) Κσυπ Cyp   21:35, 19 Jun 2005 (UTC)
I've reverted, I just noticed that the graph doesn't have a linear scale. Rethinking. Zeimusu | (Talk page) 15:22, 25 Jun 2005 (UTC)

Fuzzy number

Just in case you didn't notice, some people are having difficult making out the second digit of Image:TestDeuGamma165.png, and not because they're colour blind (see Talk:Color_blindness). Could you help clear it up? Thanks. Deco 23:20, 18 Jun 2005 (UTC)

Without being told aforehand, there is no way to tell that the green irregular shapes are supposed to represent numbers. Squinting and taking distance helps, but still… Shinobu 14:42, 19 Jun 2005 (UTC)
I know it's not clear, the pictures ought be redrawn somehow, but I don't know when I'll have time... Κσυπ Cyp   21:35, 19 Jun 2005 (UTC)

4D rotations using quaternions

Hi... regarding 4d rotations with quaternions, do you have any references for the following formula, or in general, using quaternions for 4D geometry?

   

Thanks, Alem.

I saw it on a web page somewhere, don't remember where. I've edited the article to add a proof that it they can represent 4D rotations, although I haven't proved that all 4D rotations can be represented that way (although they can all be). Κσυπ Cyp   14:11, 15 July 2005 (UTC)
That equation is the standard double covering of SO(3) by SU(2). Most books on special relativity will review this, as will books on group representation theory. The bit about 4D is also covered in texts dealing with the symmetries of planetary orbits. There are two SO(3) symmetries of planetary orbits, the "obvious" one, and another one that leads to various invariant orbital parameters. Its a special case of the Poincare group; searching for that will give more info.
BTW, I don't understand why people still use quaternions for rotations when SU(2) is so much cleaner and more elegant ... can this be explained/clarified somewhere, e.g. in the quaternion article? Is it just historical accident? (the computer graphics people seem to be ga-ga over this). Is there something special about the algebra? If so, then why not use the dihedral group, or one of the other algebras with oddball signatures? What's the appeal? linas 17:22, 20 August 2005 (UTC)

L-Game pictures

Hi, I've used your L_GameFinal.png picture in the german wikipedia (see here [1]), hope this is OK. If not, please drop a line in my user-page. Greetings Maex (German Wiki-page at [2]

Yes, it's completely fine. Κσυπ Cyp   14:59, 11 August 2005 (UTC)
::Thanks

Spherical harmonics

Hey, great polyhedra! Anyway, care to put the table of high-order spherical harmonics in its own article? Per Talk:Spherical harmonics. linas 23:18, 16 August 2005 (UTC)

Done. Κσυπ Cyp   06:39, 20 August 2005 (UTC)


Ladder Paradox

Hello - If you have time, could you check out the Ladder Paradox page, especially the discussion page. We are in dire need of a tie-breaker. Thanks PAR 02:20, 23 August 2005 (UTC)

MISLABELED polyehedron images

These two images are mislabeled/reversed:

  • Image:Disdyakisdodecahedron.jpg
  • Image:Disdyakistriacontahedron.jpg

Since it looks like you created/uploaded them, I'll let you correct them. Thanks!

I discovered this while trying to label them on a new Semiregular polyhedra article I started last week.

Tom Ruen 23:21, September 11, 2005 (UTC)

As far as I can tell unless someone else somehow swapped the files, Image:Disdyakisdodecahedron.jpg (reference: Mathworld, Pretty page) and Image:Disdyakistriacontahedron.jpg (reference: Mathworld, Pretty page) are not mislabelled. Κσυπ Cyp   19:06, 13 September 2005 (UTC)
  • Strange - your namings are consistent with the linked images. Apparently they are just weird names. I would have expected a "dodecahedron" named object to have 5-fold symmetry, but I guess it implies a rhombic dodecahedron.
    • Dual of "truncated cuboctahedron" is a "Disdyakis dodecahedron".
    • Dual of "truncated icosidodecahedron" is "Disdyakis triacontahedron".

My source book ("The Geometric Foundation of Natural Structure: A source book of design", by Robert Williams) names them differently:

  • 4.6.8 is called a "Great Rhombicuboctahedron" and dual V4.6.8 is called a "Hexakis Octahedron"
  • 4.6.10 is called a "Great Rhombicosidodecahedron" and dual V4.6.10 is called a "Hexakis Icosahedron"
The archimedean solid and catalan solid articles mention the alternate names, and so do the references. I agree that the names are weird, but I didn't name them. Κσυπ Cyp   06:03, 14 September 2005 (UTC)

Image:Antialiased line and ellipse.png has been listed for deletion

An image or media file you uploaded, Image:Antialiased line and ellipse.png, has been listed at Wikipedia:Images and media for deletion. Please look there to see why this is (you may have to search for the title of the image to find its entry), if you are interested in it not being deleted. Thank you.

--Bash 22:47, 30 September 2005 (UTC)

Image:Nonantialiased line and ellipse.png has been listed for deletion

An image or media file you uploaded, Image:Nonantialiased line and ellipse.png, has been listed at Wikipedia:Images and media for deletion. Please look there to see why this is (you may have to search for the title of the image to find its entry), if you are interested in it not being deleted. Thank you.

--Bash 22:47, 30 September 2005 (UTC)

Pic of the day

Hi Cyp,

Just to let you know that your illustration Image:Pentakisdodecahedron02.gif is up for a reappearance as Pic of the Day again. I've used the same caption as last time, but you can make any changes at Wikipedia:Picture of the day/November 2, 2005. -- Solipsist 14:01, 31 October 2005 (UTC)

Polyhedron Animations

Hey, your images and animations for the platonic and archimedean solids look really nice. Any plans for creating similar animations for the Kepler-Poinsot solids? --Monguin61 05:59, 11 December 2005 (UTC) Nice animations, have you considered adding some perspective? Parallel projection does look a bit odd for some models.

p.s. You might like to have a look at http://singsurf.org/polyhedra/uniform.html a page I created a while back which allows mouse controled rotations. --Pfafrich 11:33, 10 January 2006 (UTC)

Whoopse, it seems you do use perspective after all. It must be my eyes. --Pfafrich 11:53, 10 January 2006 (UTC)

Worldline animation

Just wanted to let you know I've nominated your animation of a particle's worldline as a featured picture. It's at Wikipedia:Featured picture candidates/Lorentz transform of world line. — Laura Scudder 18:54, 2 February 2006 (UTC)

Featured Picture

Your image Image:Lorentz transform of world line.gif has just become a featured picture! Congratulations, and thanks for making it for us. Raven4x4x 05:50, 16 February 2006 (UTC)

You're cool but maybe a little nerdy

Hey man you rule. Thanks for your contribution to the tetrahedron page and just knowledge of everything tetrahedronic. That's a word right? I have a short survey that I hope you can fill out.

1. Would you consider yourself a nerd?

2. If so, how long have you been a nerd? If not, name one of your favorite bands.

3. If you answered that you have been a nerd since you were young, did bullies pick on you? If you did not answer this, name a good album.

Thanks!

Image:Sincos pretty.png

Can you please describe on this image's description page how you derived this particular graph? What equation was used? Denelson83 00:00, 10 March 2006 (UTC)

If you haven't seen...

You are being talked about here. If you have desire to participate, please do so. Thanks. --LV (Dark Mark) 19:50, 13 March 2006 (UTC)

Request

Hi Cyp,

My name is Fernanda Viégas and I have been studying Wikipedia for a while now (you can see a paper I published on the subject here). I would like to ask you a few questions about your activities as a Wikipedia illustrator. I am fascinated by the pictorial side of Wikipedia and it would be great to hear about this community from one of its members. Would you be available for an email interview? Thanks, — Fernanda 00:37, 4 April 2006 (UTC) | talk

Hi again, Cyp. I have started sending out the questionnaire to participants in the study and it would be great if you could participate too. If you'd like to get in touch with me via email, please use the "Email this user" feature on my page. Thanks! — Fernanda 20:48, 4 April 2006 (UTC) | talk

Request

Hi, I'm editing an italian page about Taylor series. Since it includes your image Sintay.png, and since I find it good, and since I'd like to create other images in the same style for the article, could I ask you to suggest me the graph program you use? Please write here: http://it.wikipedia.org/wiki/Utente:Toobaz Thanx toobaz 131.114.73.133 13:11, 3 April 2006 (UTC)

Image:Rotating spherical harmonics.gif

Please place the images on topic pages (galleries) or put the images directly into a category

Please keep in mind that images uploaded to the commons should be useful to all users of wikimedia projects - this is possible only if the images can be found by other people. To allow others to find the images you uploaded here, the images should be in some place that can be found by navigating the category structure. This means that you should either place the images on topic pages (galleries) or put the images directly into a category, or do both. To find good categories for your images, the CommonsSense tool may help.

The important point is that the images should be placed in the general structure somewhere. There is a large number of completely unsorted images on the commons right now. If you would like to help to place some of those images where they can be found, please do! You can find a convenient overview of your uploaded files here: Gallery Thank you. --gildemax 14:58, 22 April 2006 (UTC)

Could you make a nice plyhedra

Could you make the following imiges better:

Otherwise this page look a bit strange. --Tosha 16:52, 10 June 2006 (UTC)

Spectrum Image and Colour Values

I would like to recreate a spectrum image similar to Spectrum441pxWithnm.png to be plotted on a figure created in R (http://www.r-project.org/). I have found CIE colour matching function and coordinate data on the internet and have tried to recreate the XYZ colours in RGB values using a colour converter function based on conversion algorithms from http://brucelindbloom.com. The resulting colours are not giving similar values to those plotted in your spectrum image. I was wondering if you had RGB values and corresponding wavelengths for the spectrum image you created that I could use? Dicoria 15:06, 20 June 2006 (UTC)

b:WB:RFA

Hello Cyp. I just wanted to let you know that a new policy has been created at en.wikibooks that asks all admins who have been inactive for a year or more to give up their admin privledges there. This should not be considered a punishment of any sort, we are only asking that people who have no specific need for the additional tools should return them.

If you do not plan on returning to our project, we ask that you please give up your tools. If you would like to return to the project, we would be happy to have you back. If you have any questions, please let me know on my wikibooks userpage: b:User talk:Whiteknight. --User:Wknight8111 (WB:Whiteknight) 17:49, 2 October 2006 (UTC)

Galilean world line?

I second the motion that Image:Lorentz transform of world line.gif is awesome. Could you possibly make a Galilean analogue for comparison? I could probably do it myself, but I'm lazy! Melchoir 21:22, 16 October 2006 (UTC)

Transparent Icosahedron

http://en.wikipedia.org/wiki/Image:D20trans.gif

Just so you know! Piuro 20:47, 31 October 2006 (UTC)

Optimal solutions for Rubik's Cube/using the optimal solver

Remember this? It's been prod'ed. Regards, Rich Farmbrough, 12:29 1 December 2006 (GMT).

request for e-mail

Hello. When you can find the time, would you drop me an e-mail at robertaustin(at)teacher(dot)com? I'd like to discuss something related to polyhedra with you. RobertAustin 15:40, 21 December 2006 (UTC)

Polyhedra images

Hello! In the past, you did some nice images of polyhedra which I'm using for the article de:Spielwürfel (Dice) in the German Wikipedia. When you scroll through the article (I don't know whether you can read German, but it's just about the pictures ;)) you will see that for some of the more obscure dice there are no schematics. Could you be bothered to create them? I hope to get the article featured in the German Wikipedia (and maybe translate it later to replace the inferior English one) and completeness in images would be very useful in achieving this goal. If you are willing to help, I could supply an English list of the missing polyhedra, of course. Traitor de 18:04, 25 December 2006 (UTC)

Image:Ln_.png - Values on the axes?

Hi Cyp!

I am trying to improve on the Danish article regarding the natural logarithm. One planned improvement is that I am looking for is a nice graph of the ln(x) function (I'm afraid I'm not that talented that I can make one myself). Then I looked for a graph in Commons and found your Ln_.png graph.

I can see this graph is used in several articles concerning the natural logaritm. I am however, a little hesitant because it is not clear from the graph that, e.g., . Would you consider adding that to the graph or perhaps make another one, which has values on the axes?Slaunger 21:01, 8 January 2007 (UTC)

Image:Hq9p.c

I'm nominating Image:Hq9p.c for deletion. Don't upload source code to Wikipedia. It should be linked to an external site if necessary. However, this program isn't particularly notable since there are many HQ9+ interpreters. Superm401 - Talk 14:13, 21 January 2007 (UTC)

Image:Rubik222.jpg listed for deletion

An image or media file that you uploaded or altered, Image:Rubik222.jpg, has been listed at Wikipedia:Images and media for deletion. Please look there to see why this is (you may have to search for the title of the image to find its entry), if you are interested in it not being deleted. Thank you. BigDT 19:09, 3 February 2007 (UTC)

BS!

GDBarnstar1.png The Graphic Designer's Barnstar
I Kevin, hereby award Cyp the Graphic Designer's Barnstar for his really cool-looking 3-D models of polyhedra. They blew my mind, man.

Image:Keyboard Layout German.png listed for deletion

An image or media file that you uploaded or altered, Image:Keyboard Layout German.png, has been listed at Wikipedia:Images and media for deletion. Please look there to see why this is (you may have to search for the title of the image to find its entry), if you are interested in it not being deleted. Thank you. —Remember the dot (talk) 04:37, 16 April 2007 (UTC)

Image:Keyboard Layout.html listed for deletion

An image or media file that you uploaded or altered, Image:Keyboard Layout.html, has been listed at Wikipedia:Images and media for deletion. Please look there to see why this is (you may have to search for the title of the image to find its entry), if you are interested in it not being deleted. Thank you. Sherool (talk) 23:39, 11 May 2007 (UTC)

This one too Image:L GameFinal.png has been replaced by a SVG. --Sherool (talk) 23:53, 11 May 2007 (UTC)

Image:Keyboard_Layout_Arabic.png listed for deletion

An image or media file that you uploaded or altered, Image:Keyboard_Layout_Arabic.png, has been listed at Wikipedia:Images and media for deletion. Please see the discussion to see why this is (you may have to search for the title of the image to find its entry), if you are interested in it not being deleted. Thank you. Sherool (talk) 15:00, 30 May 2007 (UTC)

Simulated Annealing ...

Cyp: Interested in the article posted about "Simulated Annealing", specially about the two images posted there. I was wondering if you would be willing to provide more details about how you were able to generate those images, perhaps some formulae or some code ? Thanks. Svglolla 03:55, 12 June 2007 (UTC)

Sorry about the delay, I've been a bit busy. I've added the code (compressed) to Image:SimulatedAnnealingFast.jpg, hope there's no problem extracting it. It might be a bit ugly, it's some time since I wrote it. (Don't remember what graph.{cpp,h} was for, I don't think it's used.) Κσυπ Cyp   10:48, 22 July 2007 (UTC)
Seems it's gone with the transfer to Commons... could you or someone else post it again? Nerd bzh (talk) 21:08, 29 September 2011 (UTC)
It's posted here: https://github.com/Cyp/wiki-images/tree/master/anneal2 Κσυπ Cyp   10:55, 30 September 2011 (UTC)

Nice edit summary

Just stumbled across this and wanted to let you know that I enjoyed the humor, if it's not too late. — Sebastian 20:07, 19 June 2007 (UTC)

Orphaned non-free image (Image:Mainpageieupsidedown.png)

Thanks for uploading Image:Mainpageieupsidedown.png. The image description page currently specifies that the image is non-free and may only be used on Wikipedia under a claim of fair use. However, the image is currently orphaned, meaning that it is not used in any articles on Wikipedia. If the image was previously in an article, please go to the article and see why it was removed. You may add it back if you think that that will be useful. However, please note that images for which a replacement could be created are not acceptable for use on Wikipedia (see our policy for non-free media).

If you have uploaded other unlicensed media, please check whether they're used in any articles or not. You can find a list of 'image' pages you have edited by clicking on the "my contributions" link (it is located at the very top of any Wikipedia page when you are logged in), and then selecting "Image" from the dropdown box. Note that any non-free images not used in any articles will be deleted after seven days, as described on criteria for speedy deletion. Thank you. BetacommandBot 06:45, 21 June 2007 (UTC)

some questions about steganography

Hello,
I hope I put my question properly, I'm kind of a newbie...
I saw your picture in the steganography subject (http://en.wikipedia.org/wiki/Image:StenographyOriginal.png) and I would like to know how you did it. I'm trying to find a good (if possible) GNU software able to do it.
Regards
O.G. 22 june 2007 01:38

Not sure how to do it right (I'm sure there's a way), but this almost works (using Imagemagick):
convert img1.jpg img2.jpg -fx '((u*255)&252)/255+v/85' test.png
Unfortunately, it doesn't dither the second image. (Written this on the image talk page, too.) Κσυπ Cyp   20:10, 22 July 2007 (UTC)

Polyhedron image format

POV-Ray-made images, especially those with sharp details like your polyhedron, look a lot better in the PNG format. Don't bother with existing images if you don't want to, but please upload new ones in PNG. 201.212.126.164 19:22, 22 September 2007 (UTC)

More Polyhedral Love

Just chiming in to say that poly.pov rocks, and I've been using it to make myself some pretty wallpapers. Thanks for posting it! Gebstadter (talk) 00:00, 4 June 2008 (UTC)

Found poetry

I noticed you edited found poetry in the early stages of being an article. It seems to have stagnated a little. Can you please help with this? --Justpassin (talk) 23:15, 8 June 2008 (UTC)

Element orders versus conjugacy classes

I noticed you added a table of element orders to Janko group J1 and Janko group J2. There are a couple of problems that were easily fixed for J1, but present more difficulty for J2. The primary problem is no original research and citing sources; you need to give sources for the information. The secondary problem is that the tables are more useful if you don't lump different types of elements of the same order together; instead display the sizes and element orders of the conjugacy classes.

For J1 this is easy to fix because the classes having the same order differ in very simple ways (5A is just 5B^-1, 10A is just 10B^-1, 15A is just 15B^-1, and 19A = 19B^4 = 19C^2). In particular, they all have the same size. This information is stored in the character table of the group, so is available in the book called the ATLAS, is available at the online atlas, specifically on a page such as the J1 page, and is available through software such as CtblLib.

For J2 the conjugacy classes for orders 2, 3, 5, 6, and 10 come in two radically different types (and some of those types split into two more classes like for J1).

I think it is probably better to include conjugacy class information in the articles, because it is easily summed to give the order information, and can be sourced easily. For J1, I made this change unobtrusively, but for J2 such a change would mean rewriting the table. JackSchmidt (talk) 20:53, 30 June 2008 (UTC)

Looks like you are already working on this for the Mathieu groups. I'll check for power equivalence on the two smaller Mathieu groups and check the situation for the two larger ones. JackSchmidt (talk) 20:56, 30 June 2008 (UTC)
For M11, 8A = 8B^-1, and 11A = 11B^-1.
For M12, 2A and 2B have different sizes (396 and 495), 3A and 3B have different sizes (1760 and 2640), 4A and 4B are not power equivalent, but have the same size, 6A and 6B have different sizes (7920 and 2*7920), 8A and 8B are not power equivalent, but have the same size, and 11A = 11B^-1.
For M22, 4A and 4B are different sizes (13860 and 13860*2), 7A = 7B^-1, 11A = 11B^-1, and the other orders are single classes.
For M23, 7A = 7B^-1, 11A = 11B^-1, 14A = 14B^-1, 15A = 15B^-1, 23A = 23B^-1.
For M24, 6A and 6B have the same size, but are not power equivalent, 7A = 7B^-1, 14A = 14B^-1, 15A = 15B^-1, 21A = 21B^-1, 23A = 23B, and here are the orders and class sizes:
M24    Order       Size
[[         1,         1 ],
 [         2,     11385 ],
 [         2,     31878 ],
 [         3,    226688 ],
 [         3,    485760 ],
 [         4,    637560 ],
 [         4,   1912680 ],
 [         4,   2550240 ],
 [         5,   4080384 ],
 [         6,  10200960 ],
 [         6,  10200960 ],
 [         7,   5829120 ],
 [         7,   5829120 ],
 [         8,  15301440 ],
 [        10,  12241152 ],
 [        11,  22256640 ],
 [        12,  20401920 ],
 [        12,  20401920 ],
 [        14,  17487360 ],
 [        14,  17487360 ],
 [        15,  16321536 ],
 [        15,  16321536 ],
 [        21,  11658240 ],
 [        21,  11658240 ],
 [        23,  10644480 ],
 [        23,  10644480 ] ]
Looks like M12 and M24 would be difficult to annotate with only one row per order. M11 and M23 are easy, M22 is probably fine. JackSchmidt (talk) 21:21, 30 June 2008 (UTC)
I think the tables with the ATLAS link should be fine as far as sourcing. I like the idea of having the tables rows being conjugacy classes, but with similar rows "grouped" somehow. I don't know much about table formatting, but I know some people can make really pretty things. I'll leave the tables as is, but feel free to mess around with them. Scott (the main sporadics guy) probably has some opinion too; he is very interested in the groups as concrete things, so he might want to split them up by how they act on some geometric figure or something. Let me know if you want me to crunch any data, or explain why conjugacy classes are better, or whatever.
BTW, I was just scanning your old talks, and found Truncated dodecahedron quite funny. JackSchmidt (talk) 21:39, 30 June 2008 (UTC)

Here is how I would do it:

  • List classes that are not power equivalent on separate lines
  • List power equivalent classes together on common line
  • Make far right-hand column to give cycle structures
  • Possibly delete factorization of orders to make more room. Our elements have orders that are pretty well known, none greater than 23.

There is a problem with M11: it has representations of degrees 11 and 12, or you can call it a group of degree 23, with orbits 11 and 12, as it is represented in M24.

M12 has a peculiarity: an outer automorphism that transposes 2 classes of 4-elements and 2 of 8-elements. Scott Tillinghast, Houston TX (talk) 22:21, 30 June 2008 (UTC)

Are truncated dodecahedra related to echinoderms? If so, they would probably be related to us vertebrates. Scott Tillinghast, Houston TX (talk) 22:40, 30 June 2008 (UTC)

I think there could be some relation... Κσυπ Cyp   21:14, 5 July 2008 (UTC)

I have posted a table for M24. I thank Jack Schmidt for the table of conjugacy class sizes.

I have gotten the table for M24 to where I am satisfied. Scott Tillinghast, Houston TX (talk) 16:47, 1 July 2008 (UTC)

The new M24 table with rowspans and cycle structures looks very nice! Thanks to both of you. JackSchmidt (talk) 19:09, 1 July 2008 (UTC)
I don't know what cycle structures are, but glad the table looks nice. (When I added the first table, I didn't know whether it was relevant (since I don't know much about groups), I just realised that some of the groups were small enough that all the elements could fit in memory. Seems it got a lot more interest than I was expecting...)
Tried installing GAP, and making a table (see Talk:Janko group J3), but it's probably easier for someone who has more experience with GAP. Κσυπ Cyp   21:14, 5 July 2008 (UTC)

Survey request

Hi,
I need your help. I am working on a research project at Boston College, studying creation of medical information on Wikipedia. You are being contacted, because you have been identified as an important contributor to one or more articles.

Would you will be willing to answer a few questions about your experience? We've done considerable background research, but we would also like to gather the insight of the actual editors. Details about the project can be found at the user page of the project leader, geraldckane. Survey questions can be found at geraldckane/medsurvey. Your privacy and confidentiality will be strictly protected!

The questions should only take a few minutes. I hope you will be willing to complete the survey, as we do value your insight. Please do not hesitate to contact me or Professor Kane if you have any questions.

Thank You, BCeagle0312 (talk) 02:40, 18 July 2008 (UTC)

Rubik 4x4x4

Hi,

I've read the article on the Rubik_Revenge 4x4x4 cube. I disagree with the quoted number of configurations. I think it should be divided by two. Are you sure the 24 centre cubelets can be arbitrarily permuted? I have constructed a Strong-Generating-Set representation of the group and I cannot construct odd permutations of the centre cubelets only. Actually, the article says "An odd permutation of the corner cubelets implies an odd permutation of the centre cubelets, and vice versa". In my opinion, that means that once we have chosen the corners configuration (one of the 8! * 3^7) then we know whether the corners configuration is even or odd, and hence we know whether the centres configuration is even or odd. That is, there are 24!/2 possibilities, and not 24!, as it is stated right now in the article.

Do you agree with that?

Thank you very much in advance, Jmmartingarcia (talk) 06:31, 2 August 2008 (UTC).

Hi,
I think 24!/2 is the right factor (after fixing the corner cubelets), if all the centre cubelets are distinguishable. The number of distinguishable permutations given is 24!/(4!6), assuming centre cubelets of the same colour are indistinguishable, and the odd/even factor of 2 should be included in that 4!6. Κσυπ Cyp   21:22, 2 August 2008 (UTC)
Hi again,
You are very right. I now agree with the number, though I still find the explanations in the article somehow confusing. For example, if all cubelets were distinguishable, all permutations in the group would have even parity (this is a generic feature of the NxNxN cubes with N a multiple of 4) and so the sentence "even and odd permutations are indistinguishable because of identically coloured centre cubelets" does not seem appropriate to me. But this is less important...
Thanks! —Preceding unsigned comment added by Jmmartingarcia (talkcontribs) 01:56, 3 August 2008 (UTC)

License for Image:Nflash.gif

Your Image:Nflash.gif
Move to commons representation

The image Nflash.gif is a candidate to be copied to the Wikimedia Commons. When you uploaded this image, you licensed it for use under the GNU Free Documentation License (GFDL). On behalf of the Wikipedia and Commons communities, thank you. However, the GFDL requires that reproductions of the image (and any other GFDL-licenced works), must be accompanied by the full text of the GFDL. The GFDL is intended more for documentation and not images, so downstream re-users may be hindered by additional restrictions of the GFDL which may not work well on the use of one image.

Before I copy this image to the Commons, I wanted to ask whether you would be willing to multilicense your work under an additional license, such as a Creative Commons licence. Creative Commons licences, such as the Attribution Share-Alike license provide a similar copyleft permission to the GFDL, but without some of its requirements such as the distribution of the licence text. All you need to do, is place the additional license tag alongside your current license. Users can choose between which one they want to use the image under. There are many free licenses accepted on Wikipedia and Commons which can provide freedoms similar to the GFDL, but without some of its requirements.

You are under no obligation whatsoever to alter the license. Doing so merely cooperates with those members of the community who believe that multilicensing your work can ease the reuse of images outside of Wikipedia.

If you use a GFDL license tag which requires distribution of Wikipedia's general disclaimer (indicated by "Subject to disclamiers" in the template), it is also suggested that you switch it to one which does not apply them.

Whether or not you choose to dual-license your work, thank you for your consideration.

Please also see Wikipedia:Copyrights and Wikipedia:Moving images to the Commons for more information.
This message was placed using Template:Dual-licence.

Thanks! --Sfan00 IMG (talk) 12:59, 5 November 2008 (UTC)

Yes, I would be willing to multi-licence the great big flashing red "N" which isn't used anywhere. Κσυπ Cyp   17:23, 9 December 2008 (UTC)

Fair use rationale for Image:Droaspamsmall.png

Thanks for uploading or contributing to Image:Droaspamsmall.png. I notice the image page specifies that the image is being used under fair use but there is not a suitable explanation or rationale as to why each specific use in Wikipedia constitutes fair use. Please go to the image description page and edit it to include a fair use rationale.

If you have uploaded other fair use media, consider checking that you have specified the fair use rationale on those pages too. You can find a list of 'image' pages you have edited by clicking on the "my contributions" link (it is located at the very top of any Wikipedia page when you are logged in), and then selecting "Image" from the dropdown box. Note that any non-free media lacking such an explanation will be deleted one week after they have been uploaded, as described on criteria for speedy deletion. If you have any questions please ask them at the Media copyright questions page. Thank you. Sfan00 IMG (talk) 14:04, 8 November 2008 (UTC)


Image source problem with Image:Rubik444.jpg

Image Copyright problem

Thanks for uploading Image:Rubik444.jpg. I noticed that the file's description page currently doesn't specify who created the content, so the copyright status is unclear. If you did not create this file yourself, you will need to specify the owner of the copyright. If you obtained it from a website, then a link to the website from which it was taken, together with a restatement of that website's terms of use of its content, is usually sufficient information. However, if the copyright holder is different from the website's publisher, their copyright should also be acknowledged.

If you have uploaded other files, consider checking that you have specified their source and tagged them, too. You can find a list of files you have uploaded by following this link. Unsourced and untagged images may be deleted one week after they have been tagged, as described on criteria for speedy deletion. If the image is copyrighted under a non-free license (per Wikipedia:Fair use) then the image will be deleted 48 hours after 14:05, 8 November 2008 (UTC). If you have any questions please ask them at the Media copyright questions page. Thank you. Sfan00 IMG (talk) 14:05, 8 November 2008 (UTC)

I created the image myself - I think that goes for every image I've uploaded... Κσυπ Cyp   17:23, 9 December 2008 (UTC)


Image source problem with Image:Keyboard Layout Danish.png

Image Copyright problem

Thanks for uploading Image:Keyboard Layout Danish.png. I noticed that the file's description page currently doesn't specify who created the content, so the copyright status is unclear. If you did not create this file yourself, you will need to specify the owner of the copyright. If you obtained it from a website, then a link to the website from which it was taken, together with a restatement of that website's terms of use of its content, is usually sufficient information. However, if the copyright holder is different from the website's publisher, their copyright should also be acknowledged.

If you have uploaded other files, consider checking that you have specified their source and tagged them, too. You can find a list of files you have uploaded by following this link. Unsourced and untagged images may be deleted one week after they have been tagged, as described on criteria for speedy deletion. If the image is copyrighted under a non-free license (per Wikipedia:Fair use) then the image will be deleted 48 hours after 11:48, 9 December 2008 (UTC). If you have any questions please ask them at the Media copyright questions page. Thank you. Papa November (talk) 11:48, 9 December 2008 (UTC)

I created it myself. But it's rather useless/redundant, now that there are much more portable/standard .svg image replacements... Κσυπ Cyp   17:23, 9 December 2008 (UTC)

Feynman Propagator

http://en.wikipedia.org/wiki/Propagator#Feynman_propagator Absoluteley beatiful visualization. Can't stop looking at this - belongs in every QFT book. I wish there would be more information on this - how did you create it? --82.83.32.252 (talk) 23:21, 23 January 2009 (UTC)

Glad that you like the images.
The source code used to generate all the images is on the description page for the first image - search for the line saying "C++ source code - click on "show" on the right to view", and click on the arrow on the right to see it. (It's easy to miss.) A relatively recent version of g++ is probably needed, since it uses std::tr1:: for the H and J functions.
Κσυπ Cyp   22:42, 24 January 2009 (UTC)

NowCommons: File:Snub hexahedron ccw.png

File:Snub hexahedron ccw.png is now available on Wikimedia Commons as Commons:File:Snub hexahedron ccw (1).png. This is a repository of free media that can be used on all Wikimedia wikis. The image will be deleted from Wikipedia, but this doesn't mean it can't be used anymore. You can embed an image uploaded to Commons like you would an image uploaded to Wikipedia, in this case: [[File:Snub hexahedron ccw (1).png]]. Note that this is an automated message to inform you about the move. This bot did not copy the image itself. --Erwin85Bot (talk) 17:09, 15 February 2009 (UTC)

File:Snub dodecahedron cw.png is now available as Commons:File:Snub dodecahedron cw (1).png. --Erwin85Bot (talk) 17:11, 15 February 2009 (UTC)


File copyright problem with File:Maze.png

File Copyright problem

Thank you for uploading File:Maze.png. However, it currently is missing information on its copyright status. Wikipedia takes copyright very seriously. It may be deleted soon, unless we can determine the license and the source of the file. If you know this information, then you can add a copyright tag to the image description page.

If you have uploaded other files, consider checking that you have specified their license and tagged them, too. You can find a list of files you have uploaded by following this link.

If you have any questions, please feel free to ask them at the media copyright questions page. Thanks again for your cooperation. Radiant chains (talk) 11:24, 30 April 2009 (UTC)

File:Poly.pov missing description details

Dear uploader: The media file you uploaded as File:Poly.pov is missing a description and/or other details on its image description page. If possible, please add this information. This will help other editors to make better use of the image, and it will be more informative for readers. If you have any questions please see Help:Image page. Thank you. Sfan00 IMG (talk) 23:48, 4 May 2009 (UTC)

File:Maze.png missing description details

Dear uploader: The media file you uploaded as File:Maze.png is missing a description and/or other details on its image description page. If possible, please add this information. This will help other editors to make better use of the image, and it will be more informative for readers. If you have any questions please see Help:Image page. Thank you. Sfan00 IMG (talk) 23:54, 4 May 2009 (UTC)

File source problem with File:Poly.pov

File Copyright problem

Thanks for uploading File:Poly.pov. I noticed that the file's description page currently doesn't specify who created the content, so the copyright status is unclear. If you did not create this file yourself, you will need to specify the owner of the copyright. If you obtained it from a website, then a link to the website from which it was taken, together with a restatement of that website's terms of use of its content, is usually sufficient information. However, if the copyright holder is different from the website's publisher, their copyright should also be acknowledged.

If you have uploaded other files, consider checking that you have specified their source and tagged them, too. You can find a list of files you have uploaded by following this link. Unsourced and untagged images may be deleted one week after they have been tagged, as described on criteria for speedy deletion. If the image is copyrighted under a non-free license (per Wikipedia:Fair use) then the image will be deleted 48 hours after 13:57, 8 July 2009 (UTC). If you have any questions please ask them at the Media copyright questions page. Thank you. Sfan00 IMG (talk) 13:57, 8 July 2009 (UTC)

Undecidability

Hi Cyp,

I know your recent edits to halting problem were in good faith, but I'm afraid you've fallen into a common trap of confusing two entirely separate (though, admittedly, somewhat related, which is why it's confusing) senses of the word undecidable.

In the relevant sense in the article, it is impossible for it to be undecidable whether a single program halts. Proof: Let P be a program. It either halts or it doesn't, even if we don't know which. Write two programs, YES and NO. YES prints out "P halts"; NO prints out "P does not halt". Since one of these programs correctly says whether P halts or not (even if we don't know which), it is not undecidable whether P halts.

I think you're conflating this sort of undecidability with the sort where, say, a formal theory T proves neither its Goedel sentence GT nor the negation of that sentence. But that's different. In the halting-problem context, there is no fixed formal theory in the background — the undecidability involved is a matter of Platonic truth. --Trovatore (talk) 18:25, 10 July 2009 (UTC)

Commons:File:Wikicolourtest.png

This file was moved to Commons from English Wikipedia, but some description information may have got lost in the process.

As you are noted as the original uploader, or in the history for the file, it would be appreciated if you could help in reconstructing this information.

Please also consider checking Commons for other media that you may have uploaded locally, but which was subsequently transferred.

Special:Log for uploads can help in this.

Thanks for you assistance and keep uploading 'free' media :)Sfan00 IMG (talk) 16:07, 21 July 2009 (UTC)

Commons:File:Spectrum441px.png

This file was moved to Commons from English Wikipedia, but some description information may have got lost in the process.

As you are noted as the original uploader, or in the history for the file, it would be appreciated if you could help in reconstructing this information.

Please also consider checking Commons for other media that you may have uploaded locally, but which was subsequently transferred.

Special:Log for uploads can help in this.

Thanks for you assistance and keep uploading 'free' media :)Sfan00 IMG (talk) 17:08, 21 July 2009 (UTC)

Commons:File:Spectrum441pxPro.png

This file was moved to Commons from English Wikipedia, but some description information may have got lost in the process.

As you are noted as the original uploader, or in the history for the file, it would be appreciated if you could help in reconstructing this information.

Please also consider checking Commons for other media that you may have uploaded locally, but which was subsequently transferred.

Special:Log for uploads can help in this.

Thanks for you assistance and keep uploading 'free' media :)Sfan00 IMG (talk) 17:13, 21 July 2009 (UTC)

Commons:File:Spectrum441pxDeu.png

This file was moved to Commons from English Wikipedia, but some description information may have got lost in the process.

As you are noted as the original uploader, or in the history for the file, it would be appreciated if you could help in reconstructing this information.

Please also consider checking Commons for other media that you may have uploaded locally, but which was subsequently transferred.

Special:Log for uploads can help in this.

Thanks for you assistance and keep uploading 'free' media :)Sfan00 IMG (talk) 17:15, 21 July 2009 (UTC)

Commons:File:Spectrum441pxTri.png

This file was moved to Commons from English Wikipedia, but some description information may have got lost in the process.

As you are noted as the original uploader, or in the history for the file, it would be appreciated if you could help in reconstructing this information.

Please also consider checking Commons for other media that you may have uploaded locally, but which was subsequently transferred.

Special:Log for uploads can help in this.

Thanks for you assistance and keep uploading 'free' media :)Sfan00 IMG (talk) 17:15, 21 July 2009 (UTC)

Commons:File:ProDeuTri.png

This file was moved to Commons from English Wikipedia, but some description information may have got lost in the process.

As you are noted as the original uploader, or in the history for the file, it would be appreciated if you could help in reconstructing this information.

Please also consider checking Commons for other media that you may have uploaded locally, but which was subsequently transferred.

Special:Log for uploads can help in this.

Thanks for you assistance and keep uploading 'free' media :)Sfan00 IMG (talk) 17:39, 21 July 2009 (UTC)

Commons:File:Spectrum441pxGrey.png

This file was moved to Commons from English Wikipedia, but some description information may have got lost in the process.

As you are noted as the original uploader, or in the history for the file, it would be appreciated if you could help in reconstructing this information.

Please also consider checking Commons for other media that you may have uploaded locally, but which was subsequently transferred.

Special:Log for uploads can help in this.

Thanks for you assistance and keep uploading 'free' media :)Sfan00 IMG (talk) 17:41, 21 July 2009 (UTC)

Commons:File:SpectrumsGamma165.png

This file was moved to Commons from English Wikipedia, but some description information may have got lost in the process.

As you are noted as the original uploader, or in the history for the file, it would be appreciated if you could help in reconstructing this information.

Please also consider checking Commons for other media that you may have uploaded locally, but which was subsequently transferred.

Special:Log for uploads can help in this.

Thanks for you assistance and keep uploading 'free' media :)Sfan00 IMG (talk) 17:42, 21 July 2009 (UTC)

Polyhedra

Why did you bother making the animated gifs and the jpg images for the polyhedra? --10:41, 18 August 2009 (UTC) —Preceding unsigned comment added by Johanneskepler (talkcontribs)

Because it was fun. Κσυπ Cyp   05:56, 20 August 2009 (UTC)

File:Maze.png listed for deletion

An image or media file that you uploaded or altered, File:Maze.png, has been listed at Wikipedia:Files for deletion. Please see the discussion to see why this is (you may have to search for the title of the image to find its entry), if you are interested in it not being deleted. Thank you. FASTILYsock(TALK) 05:40, 20 December 2009 (UTC)

Speedy deletion nomination of File:Poly.pov

Ambox warning pn.svg

A tag has been placed on File:Poly.pov requesting that it be speedily deleted from Wikipedia. This has been done under section I10 of the criteria for speedy deletion, because it is a file that is not an image, sound file or video clip [i.e. a Word document or PDF file] that has no encyclopedic use.

If you think that this notice was placed here in error, you may contest the deletion by adding {{hangon}} to the top of the page that has been nominated for deletion (just below the existing speedy deletion or "db" tag), coupled with adding a note on the talk page explaining your position, but be aware that once tagged for speedy deletion, if the page meets the criterion, it may be deleted without delay. Please do not remove the speedy deletion tag yourself, but don't hesitate to add information to the page that would render it more in conformance with Wikipedia's policies and guidelines. Lastly, please note that if the page does get deleted, you can contact one of these admins to request that they userfy the page or have a copy emailed to you. IngerAlHaosului (talk) 19:23, 16 January 2010 (UTC)

Polyhedron transparent images

I love that ;-). How about the uniform polyhedra? That would look great! 4 T C 07:33, 23 February 2010 (UTC)

Simulated annealing code

Hi I think I checked your pictures of the simulated annealing scheme a couple of years ago and the source code was available for download. I can no longer get to it. Was it removed on purpose or has it been lost in some update? Thanks luis (lborruel@yahoo.com) 87.216.123.153 (talk) 18:37, 18 January 2011 (UTC)

Not sure what happened to it, but it's here now. Maybe it disappeared when the images were moved to the commons. Κσυπ Cyp   13:06, 19 January 2011 (UTC)

Gaussian_integral#Higher-order_polynomials

http://en.wikipedia.org/wiki/Gaussian_integral#Higher-order_polynomials

Hello,

Do you have any references for the formula given (or the general technique of using series approximations of Gaussian integrals)? Would you happen to know what aspect of quantum field theory involves these integrals? I searched a lot for these things, but the terms Gaussian and integral are so general that I'm not getting anywhere without more specific information.

Thanks in advance! --Xeṭrov 01:24, 24 January 2011 (UTC)

I don't know any references for the formula, but it follows from the definition of Γ, using :
and expanding in terms of gives
.
Path integrals are usually gaussian integrals or similar. Κσυπ Cyp   18:28, 25 January 2011 (UTC)
Thank you very much for explaining this. It looks like approximations are in order, but it's good to know that there is an exact formula. --Xeṭrov 22:47, 27 January 2011 (UTC)
What happens to after the "and expanding [...] in terms of" line? I assume the sums come from the infinite sum expansions of . Is it possible to expand so each term is just a product of expansion terms? --Xetrov 01:54, 2 February 2011 (UTC)
Oh, sorry, that wasn't supposed to be there (if it was there, the j would be added to the terms), as in:
If also expanding the term, then all terms would be of the form . If expanding the term but leaving the term (with , then the sum would not converge, due to growing faster than . Κσυπ Cyp   02:04, 3 February 2011 (UTC)


OH MY GOD THANK YOU SO SO SO SO SO MUCH.
I needed a series expansion for this very integral, but besides that page there isn't anything online anywhere about it, and whenever I tried to prove it I ended up summing divergent integrals, as you mentioned. I am curious if this formula does in fact exist somewhere. The page lacks references and could use one for such a complicated and difficult-to-verify formula.... But I'm no wikipedian...24.22.53.72 (talk) 06:18, 23 August 2012 (UTC)
You're welcome, glad it helped. Sorry, I don't know of any references. Κσυπ Cyp   11:09, 25 August 2012 (UTC)

Change license of File:Dodecahedron.gif ?

Hello. I'm an amateur video maker and I'd like to use this animation... Dodecahedron.gif

I understand you are the author and copyright holder. Would you be willing to change it to a CC-BY or even a CC-Zero/public-domain licence? I'd be willing to pay you for your trouble. --Billpg (talk) 07:13, 16 June 2011 (UTC)

Hi. Are you sure you need a different license on the animation, to use it? It's already under CC-BY-SA, which means you can use it already (as long as whatever it's combined with is compatible with CC-BY-SA). Κσυπ Cyp   15:47, 16 June 2011 (UTC)
Its the SA part. I often use clips that the copyright holder has only allowed me to use. Other times, I simply won't want to CC my own work. (PS, [5] That one is CC-BY-SA.) --Billpg (talk) 00:00, 17 June 2011 (UTC)
I saw the [6] video, it seems original. I'd rather not change it to CC-BY, but I'll give you permission to use it (and for you to release the combined result under CC-BY or something, if you want). Please let me know what you use it for. Κσυπ Cyp   17:28, 18 June 2011 (UTC)
Thank you. I'll switch my 'Dartford Tunnel' video to CC-BY.
I was thinking of using the spinning the dodecahedron as my motif. Like Alfred Hitchcock making a small cameo in each film, I would work in the dodecahedron in each one. If you change your mind, please ping me at my talk page. (If you will permit me to make an offer, I'd be willing to pay you 50 USD 80 USD in return for you for switching that file's license to CC0.) --Billpg (talk) 21:57, 8 July 2011 (UTC)
I'll let you use it as CC0, and instead of paying me, you may donate to Wikipedia instead, if you want. Κσυπ Cyp   15:34, 20 July 2011 (UTC)
Thank you. I appreciate it. --Billpg (talk) 19:01, 20 July 2011 (UTC)

Permission request

Hi, there; I'm trying to reach Cyp.

I'm an artist trying to locate the original source of the rotating dodecahedron at http://www.jimloy.com/geometry/dode.gif. Yours at http://upload.wikimedia.org/wikipedia/commons/7/73/Dodecahedron.gif is the closest I've seen, and I'm hoping you might know something about the source of the former one.

If so, I'd like to use the former one in a video project. However, I may try to sell DVD's of all or portions of the project, although I've never yet made enough money from my art to pay for my expenses -- my art is a labor of love, which I support through my dayjob -- but for that reason, although I'd be happy to provide a credit for the source of the dodecahedron, I'd rather not give a blanket license for others to use the video in which it's included (the video will be an hour long, produced with an incredible amount of otherwise unpaid work by myself and others, and the dodecahedron would appear for less than a minute). (In other words, the Creative Commons Attribution-Share Alike 3.0 Unreported license would not work for me, since I may attempt to recover at least a portion of my hard expenses and perhaps maybe even a bit of payment for me and the others working on the project through sales of the DVD's.)

I'd greatly appreciate any info you may be able to provide about the source of the first dodecahedron referred to above. Pls feel free to contact me with any questions. Thank you!Auralee (talk) 17:59, 3 October 2011 (UTC)

Hi. Sorry, I don't know anything about the dodecahedron the other person made, so there's no way I can give permission nor provide the source for it, either. You might have more luck if contacting the owner of the site directly (http://www.jimloy.com/email.htm). Κσυπ Cyp   09:47, 11 November 2011 (UTC)

Talk:Color blindness#Test image removal

I'm notifying you of this discussion because you created some of the images in question. Note that I've also nominated them for deletion on commons. Mangoe (talk) 14:02, 30 January 2014 (UTC)