{"id":27601,"date":"2026-04-25T09:46:48","date_gmt":"2026-04-25T06:46:48","guid":{"rendered":"https:\/\/w3.bilkent.edu.tr\/en\/?p=27601"},"modified":"2026-04-28T22:50:46","modified_gmt":"2026-04-28T19:50:46","slug":"math-seminar-counterexamples-to-the-oozing-conjecture-ozgun-unlu-330pm-april-27-2026-en","status":"publish","type":"post","link":"https:\/\/w3.bilkent.edu.tr\/en\/math-seminar-counterexamples-to-the-oozing-conjecture-ozgun-unlu-330pm-april-27-2026-en\/","title":{"rendered":"MATH Seminar: \u201cCounterexamples to the Oozing Conjecture\u201d, \u00d6zg\u00fcn \u00dcnl\u00fc, 3:30PM April 27 2026 (EN)"},"content":{"rendered":"<section class=\"entry-body\">\n<div class=\"entry-content\">\n<p>You are cordially invited to the Topology Seminar organized by the Department of Mathematics.<\/p>\n<p>Speaker: \u00d6zg\u00fcn \u00dcnl\u00fc (Bilkent)<\/p>\n<p>\u201cCounterexamples to the Oozing Conjecture \u201d<\/p>\n<p>Abstract: I will begin with a brief introduction to surgery theory and assembly maps. I will then discuss joint work with Ian Hambleton, in which we construct counterexamples to the Oozing conjecture. The Oozing Conjecture predicts that Arf-type surgery obstructions do not produce new classes under sufficiently high-codimension products. Examples of Morgan\u2013Pardon and Cappell\u2013Shaneson exhibit non-triviality in codimensions 2 and 3, respectively. We give a new example in codimension 4.<\/p>\n<p>Date: April 27, Monday, 2026<br \/>\nTime: 15:30<br \/>\nPlace: SA141<\/p>\n<\/div>\n<\/section>\n<footer class=\"entry-footer\">\n<div class=\"share\"><\/div>\n<\/footer>\n","protected":false},"excerpt":{"rendered":"<p>You are cordially invited to the Topology Seminar organized by the Department of Mathematics. Speaker: \u00d6zg\u00fcn \u00dcnl\u00fc (Bilkent) \u201cCounterexamples to the Oozing Conjecture \u201d Abstract: I will begin with a brief introduction to surgery theory and assembly maps. I will then discuss joint work with Ian Hambleton, in which we [\u2026] <\/p>\n<div class=\"clear\"><\/div>\n<p><a class=\"more_link clearfix\" href=\"https:\/\/w3.bilkent.edu.tr\/en\/math-seminar-counterexamples-to-the-oozing-conjecture-ozgun-unlu-330pm-april-27-2026-en\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[],"class_list":["post-27601","post","type-post","status-publish","format-standard","hentry","category-oldposts"],"_links":{"self":[{"href":"https:\/\/w3.bilkent.edu.tr\/en\/wp-json\/wp\/v2\/posts\/27601","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/w3.bilkent.edu.tr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/w3.bilkent.edu.tr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/w3.bilkent.edu.tr\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/w3.bilkent.edu.tr\/en\/wp-json\/wp\/v2\/comments?post=27601"}],"version-history":[{"count":1,"href":"https:\/\/w3.bilkent.edu.tr\/en\/wp-json\/wp\/v2\/posts\/27601\/revisions"}],"predecessor-version":[{"id":27602,"href":"https:\/\/w3.bilkent.edu.tr\/en\/wp-json\/wp\/v2\/posts\/27601\/revisions\/27602"}],"wp:attachment":[{"href":"https:\/\/w3.bilkent.edu.tr\/en\/wp-json\/wp\/v2\/media?parent=27601"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/w3.bilkent.edu.tr\/en\/wp-json\/wp\/v2\/categories?post=27601"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/w3.bilkent.edu.tr\/en\/wp-json\/wp\/v2\/tags?post=27601"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}