{"id":3512,"date":"2020-12-02T13:39:22","date_gmt":"2020-12-02T18:39:22","guid":{"rendered":"http:\/\/matroidunion.org\/?p=3512"},"modified":"2020-12-09T15:23:29","modified_gmt":"2020-12-09T20:23:29","slug":"online-talk-sergey-norin","status":"publish","type":"post","link":"https:\/\/matroidunion.org\/?p=3512","title":{"rendered":"Online talk: Sergey Norin"},"content":{"rendered":"\n<h5><strong>Monday, December 7,<\/strong> <strong>3pm ET<\/strong> (8pm GMT, 9am Tue NZDT)<br \/><a href=\"https:\/\/www.math.mcgill.ca\/snorin\/\"><strong>Sergey Norin<\/strong><\/a>, McGill University<br \/><strong>Densities of minor-closed graph classes<\/strong><\/h5>\n<h5><a href=\"https:\/\/youtu.be\/EIHL6DAvdvw\"><b>Youtube<\/b><\/a><\/h5>\n<h5>\u00a0<\/h5>\n<h5><b><\/b><strong>Abstract:<\/strong><\/h5>\n<h5>The density of a sparse graph class is the supremum of the ratio $|E(G)|\/|V(G)|$ taken over all non-null graphs $G$ in the class. The densities of graph classes determined by forbidding a single minor have been extensively studied, in part due to connections to the Hadwiger&#8217;s conjecture.<\/h5>\n<h5>\u00a0<\/h5>\n<h5>We will survey recent results on densities of minor-closed graph classes, including a proof of the conjecture of Eppstein that the densities of minor-closed graph classes are rational, joint with Rohan Kapadia, and joint work with Kevin Hendrey, Bruce Reed, Andrew Thomason and David Wood on densities of classes which forbid a single sparse minor.<\/h5>\n","protected":false},"excerpt":{"rendered":"<p>Monday, December 7, 3pm ET (8pm GMT, 9am Tue NZDT)Sergey Norin, McGill UniversityDensities of minor-closed graph classes Youtube \u00a0 Abstract: The density of a sparse graph class is the supremum of the ratio $|E(G)|\/|V(G)|$ taken over all non-null graphs $G$ &hellip; <a href=\"https:\/\/matroidunion.org\/?p=3512\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":19,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[11],"class_list":["post-3512","post","type-post","status-publish","format-standard","hentry","category-matroids","tag-online-talks"],"_links":{"self":[{"href":"https:\/\/matroidunion.org\/index.php?rest_route=\/wp\/v2\/posts\/3512","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/matroidunion.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/matroidunion.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/matroidunion.org\/index.php?rest_route=\/wp\/v2\/users\/19"}],"replies":[{"embeddable":true,"href":"https:\/\/matroidunion.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3512"}],"version-history":[{"count":4,"href":"https:\/\/matroidunion.org\/index.php?rest_route=\/wp\/v2\/posts\/3512\/revisions"}],"predecessor-version":[{"id":3582,"href":"https:\/\/matroidunion.org\/index.php?rest_route=\/wp\/v2\/posts\/3512\/revisions\/3582"}],"wp:attachment":[{"href":"https:\/\/matroidunion.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3512"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/matroidunion.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3512"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/matroidunion.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3512"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}