Calculus of functors: Difference between revisions
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{{infobox graph | |||
| name = Balaban 10-cage | |||
| image = [[Image:Balaban 10-cage.svg|220px]] | |||
| image_caption = The Balaban 10-cage | |||
| namesake = A. T. Balaban | |||
| vertices = 70 | |||
| edges = 105 | |||
| automorphisms = 80 | |||
| girth = 10 | |||
| diameter = 6 | |||
| chromatic_number = 2 | |||
| chromatic_index = 3 | |||
| properties = [[Cubic graph|Cubic]]<br>[[Cage (graph theory)|Cage]]<br>[[Hamiltonian graph|Hamiltonian]] | |||
}} | |||
In the [[mathematics|mathematical]] field of [[graph theory]], the '''Balaban 10-cage''' or '''Balaban (3-10)-cage''' is a 3-[[regular graph]] with 70 vertices and 105 edges named after [[Alexandru Balaban|A. T. Balaban]].<ref>{{MathWorld|urlname=Balaban10-Cage|title=Balaban 10-Cage}}</ref> Published in 1972,<ref>A. T. Balaban, A trivalent graph of girth ten, J. Combin. Theory Ser. B 12, 1-5. 1972.</ref> It was the first (3-10)-[[cage graph|cage]] discovered but is not unique.<ref>Pisanski, T.; Boben, M.; Marušič, D.; and Orbanić, A. "The Generalized Balaban Configurations." Preprint. 2001. [http://citeseer.ist.psu.edu/448980.html].</ref> | |||
The complete list of (3-10)-cage and the proof of minimality was given by O'Keefe and Wong.<ref>M. O'Keefe and P.K. Wong, A smallest graph of girth 10 and valency 3, J. Combin. Theory Ser. B 29 (1980) 91-105.</ref> There exists 3 distinct (3-10)-cages, the other two being the [[Harries graph]] and the [[Harries-Wong graph]].<ref>Bondy, J. A. and Murty, U. S. R. Graph Theory with Applications. New York: North Holland, p. 237, 1976.</ref> Moreover, the Harries-Wong graph and Harries graph are [[Spectral graph theory|cospectral graphs]]. | |||
The Balaban 10-cage has chromatic number 2, chromatic index 3, diameter 6, girth 10 and is hamiltonian. It is also a 3-[[k-vertex-connected graph|vertex-connected graph]] and a 3-[[k-edge-connected graph|edge-connected graph]]. | |||
The [[characteristic polynomial]] of the Balaban 10-cage is : <math>(x-3) (x-2) (x-1)^8 x^2 (x+1)^8 (x+2) (x+3) (x^2-6)^2 (x^2-5)^4 (x^2-2)^2 (x^4-6 x^2+3)^8</math>. | |||
==Gallery== | |||
<gallery> | |||
Image:balaban_10-cage_2COL.svg|The [[chromatic number]] of the Balaban 10-cage is 2. | |||
Image:balaban_10-cage_3color_edge.svg|The [[chromatic index]] of the Balaban 10-cage is 3. | |||
Image: balaban_10-cage_alternative_drawing.svg|Alternative drawing of the Balaban 10-cage. | |||
</gallery> | |||
==See also== | |||
[[Molecular graph]] | |||
== References == | |||
{{reflist}} | |||
{{DEFAULTSORT:Balaban 10-Cage}} | |||
[[Category:Individual graphs]] | |||
[[Category:Regular graphs]] |
Latest revision as of 08:47, 5 November 2013
Template:Infobox graph In the mathematical field of graph theory, the Balaban 10-cage or Balaban (3-10)-cage is a 3-regular graph with 70 vertices and 105 edges named after A. T. Balaban.[1] Published in 1972,[2] It was the first (3-10)-cage discovered but is not unique.[3]
The complete list of (3-10)-cage and the proof of minimality was given by O'Keefe and Wong.[4] There exists 3 distinct (3-10)-cages, the other two being the Harries graph and the Harries-Wong graph.[5] Moreover, the Harries-Wong graph and Harries graph are cospectral graphs.
The Balaban 10-cage has chromatic number 2, chromatic index 3, diameter 6, girth 10 and is hamiltonian. It is also a 3-vertex-connected graph and a 3-edge-connected graph.
The characteristic polynomial of the Balaban 10-cage is : .
Gallery
-
The chromatic number of the Balaban 10-cage is 2.
-
The chromatic index of the Balaban 10-cage is 3.
-
Alternative drawing of the Balaban 10-cage.
See also
References
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Hostgator tutorials on how to install Wordpress need not be complicated, especially when you will be dealing with a web hosting service that is friendly for novice webmasters and a blogging platform that is as intuitive as riding a bike. After that you can get Hostgator to host your domain and use the wordpress to do the blogging. Once you start site flipping, trust me you will not be able to stop. I cut my webmaster teeth on Control Panel many years ago, but since had left for other hosting companies with more commercial (cough, cough) interfaces. If you don't like it, you can chalk it up to experience and go on. First, find a good starter template design. When I signed up, I did a search for current "HostGator codes" on the web, which enabled me to receive a one-word entry for a discount. Your posts, comments, and pictures will all be imported into your new WordPress blog. - ↑ A. T. Balaban, A trivalent graph of girth ten, J. Combin. Theory Ser. B 12, 1-5. 1972.
- ↑ Pisanski, T.; Boben, M.; Marušič, D.; and Orbanić, A. "The Generalized Balaban Configurations." Preprint. 2001. [1].
- ↑ M. O'Keefe and P.K. Wong, A smallest graph of girth 10 and valency 3, J. Combin. Theory Ser. B 29 (1980) 91-105.
- ↑ Bondy, J. A. and Murty, U. S. R. Graph Theory with Applications. New York: North Holland, p. 237, 1976.