{"id":2523,"date":"2020-04-29T11:56:58","date_gmt":"2020-04-29T15:56:58","guid":{"rendered":"http:\/\/matroidunion.org\/?p=2523"},"modified":"2020-12-16T12:41:08","modified_gmt":"2020-12-16T17:41:08","slug":"online-talk-nathan-bowler","status":"publish","type":"post","link":"https:\/\/matroidunion.org\/?p=2523","title":{"rendered":"Online talk: Nathan Bowler"},"content":{"rendered":"\n<p><strong>Mon, May 4<\/strong> 3pm ET (8pm BST, 7am Tue NZST)<br \/><strong><a href=\"https:\/\/www.math.uni-hamburg.de\/home\/bowler\/\">Nathan Bowler,<\/a><\/strong> Universit\u00e4t Hamburg<br \/><strong>Quasi-graphic matroids<br \/><a href=\"https:\/\/www.youtube.com\/watch?v=yBW318MAmz8\">Youtube Link<\/a><\/strong><\/p>\n<p><strong>Abstract:<\/strong><br \/>I\u2019ll talk about a couple of classes of matroids which sit between frame and lifted-graphic matroids: the biased graphic matroids, which sit between these classes in a sense introduced by Zaslavsky, and the slightly better behaved quasi-graphic matroids, which were recently introduced by Geelen, Gerards and Whittle. I\u2019ll give a very concrete combinatorial descriptions of the quasi-graphic matroids and use this to derive a fairly clean characterisation of the biased graphic matroids. I\u2019ll discuss a topological construction giving some nontrivial examples of quasi-graphic matroids and raise the question of whether most examples are constructed in essentially this way.\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mon, May 4 3pm ET (8pm BST, 7am Tue NZST)Nathan Bowler, Universit\u00e4t HamburgQuasi-graphic matroidsYoutube Link Abstract:I\u2019ll talk about a couple of classes of matroids which sit between frame and lifted-graphic matroids: the biased graphic matroids, which sit between these classes &hellip; <a href=\"https:\/\/matroidunion.org\/?p=2523\">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-2523","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\/2523","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=2523"}],"version-history":[{"count":5,"href":"https:\/\/matroidunion.org\/index.php?rest_route=\/wp\/v2\/posts\/2523\/revisions"}],"predecessor-version":[{"id":3621,"href":"https:\/\/matroidunion.org\/index.php?rest_route=\/wp\/v2\/posts\/2523\/revisions\/3621"}],"wp:attachment":[{"href":"https:\/\/matroidunion.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2523"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/matroidunion.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2523"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/matroidunion.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2523"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}