https://en.formulasearchengine.com/index.php?action=history&feed=atom&title=Point_process_notationPoint process notation - Revision history2026-04-09T21:17:53ZRevision history for this page on the wikiMediaWiki 1.43.0-wmf.28https://en.formulasearchengine.com/index.php?title=Point_process_notation&diff=291163&oldid=preven>Fragapanagos: /* Random sequences of points */ typo fix2014-10-06T18:41:29Z<p><span class="autocomment">Random sequences of points: </span> typo fix</p>
<a href="https://en.formulasearchengine.com/index.php?title=Point_process_notation&diff=291163&oldid=30127">Show changes</a>en>Fragapanagoshttps://en.formulasearchengine.com/index.php?title=Point_process_notation&diff=30127&oldid=preven>Improbable keeler at 12:53, 11 January 20142014-01-11T12:53:06Z<p></p>
<p><b>New page</b></p><div>In algebraic topology, a '''presheaf of spectra''' on a [[topological space]] ''X'' is a contravariant functor from the category of open subsets of ''X'', where morphisms are inclusions, to the [[good category of commutative ring spectra]]. A theorem of Jardine says that such presheaves form a [[simplicial model category]], where ''F'' →''G'' is a weak equivalence if the induced map of [[homotopy sheaf|homotopy sheaves]] <math>\pi_* F \to \pi_* G</math> is an isomorphism. A '''sheaf of spectra''' is then a fibrant/cofibrat object in that category.<br />
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The notion is used to define, for example, a [[derived scheme]] in algebraic geometry.<br />
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== References ==<br />
*http://www.math.ku.dk/~jg/homotopical2008/goerss.lec2.pdf<br />
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[[Category:Algebraic topology]]<br />
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{{topology-stub}}</div>en>Improbable keeler