{"id":4936,"date":"2023-05-08T15:06:28","date_gmt":"2023-05-08T19:06:28","guid":{"rendered":"http:\/\/matroidunion.org\/?p=4936"},"modified":"2023-05-16T09:25:16","modified_gmt":"2023-05-16T13:25:16","slug":"kolja-knauer","status":"publish","type":"post","link":"https:\/\/matroidunion.org\/?p=4936","title":{"rendered":"Online Talk: Kolja Knauer"},"content":{"rendered":"\n<p><strong>YouTube recording: <\/strong><a href=\"https:\/\/www.youtube.com\/watch?v=5ID6ZX20_is\" target=\"_blank\" rel=\"noopener\">https:\/\/www.youtube.com\/watch?v=5ID6ZX20_is<\/a><\/p>\n<p><strong>Time: <\/strong>Thursday, May 11, 3pm ET<br \/><strong>Zoom:\u00a0<\/strong><a href=\"https:\/\/uwaterloo.zoom.us\/j\/8674047206?pwd=RjVGV1duUHJPbEpZTWdRR3BLSld4Zz09\" target=\"_blank\" rel=\"noopener\">https:\/\/uwaterloo.zoom.us\/j\/8674047206?pwd=RjVGV1duUHJPbEpZTWdRR3BLSld4Zz09<\/a><br \/><strong>ID: <\/strong>867 404 7206<strong><br \/>Passcode:\u00a0<\/strong>knauer1<\/p>\n<p><strong>Speaker:\u00a0<\/strong><a href=\"https:\/\/pageperso.lis-lab.fr\/~kolja.knauer\/\" target=\"_blank\" rel=\"noopener\">Kolja Knauer<\/a>, Universitat de Barcelona<br \/><strong>Title: <\/strong>Complexes of oriented matroids and their tope graphs<br \/><br \/><strong>Abstract:\u00a0<\/strong>Complexes of oriented matroids (COMs) arise from the combinatorics of a real hyperplane arrangement intersected with an open convex set. They generalize (affine) oriented matroids and capture various other classes such as convex geometries, antimatroids, CAT(0)-cube and Coxeter complexes, lopsided and ample set systems. I will give a gentle introduction and then focus on the tope graph of a COM &#8211; an object that determines the COM up to isomorphism. I will present a purely graph theoretic polynomial time verifiable characterization that specializes to oriented matroids.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>YouTube recording: https:\/\/www.youtube.com\/watch?v=5ID6ZX20_is Time: Thursday, May 11, 3pm ETZoom:\u00a0https:\/\/uwaterloo.zoom.us\/j\/8674047206?pwd=RjVGV1duUHJPbEpZTWdRR3BLSld4Zz09ID: 867 404 7206Passcode:\u00a0knauer1 Speaker:\u00a0Kolja Knauer, Universitat de BarcelonaTitle: Complexes of oriented matroids and their tope graphs Abstract:\u00a0Complexes of oriented matroids (COMs) arise from the combinatorics of a real hyperplane arrangement intersected &hellip; <a href=\"https:\/\/matroidunion.org\/?p=4936\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":21,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[11],"class_list":["post-4936","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\/4936","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\/21"}],"replies":[{"embeddable":true,"href":"https:\/\/matroidunion.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4936"}],"version-history":[{"count":3,"href":"https:\/\/matroidunion.org\/index.php?rest_route=\/wp\/v2\/posts\/4936\/revisions"}],"predecessor-version":[{"id":4943,"href":"https:\/\/matroidunion.org\/index.php?rest_route=\/wp\/v2\/posts\/4936\/revisions\/4943"}],"wp:attachment":[{"href":"https:\/\/matroidunion.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4936"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/matroidunion.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4936"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/matroidunion.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4936"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}