{"id":36098,"date":"2025-11-16T15:02:51","date_gmt":"2025-11-16T12:02:51","guid":{"rendered":"https:\/\/w3.bilkent.edu.tr\/tr\/?p=36098"},"modified":"2025-11-19T21:16:09","modified_gmt":"2025-11-19T18:16:09","slug":"math-semineri-nonextension-of-pluricanonical-forms-in-positive-and-mixed-characteristic-iacopo-brivio-1700-19-kasim-2025-en","status":"publish","type":"post","link":"https:\/\/w3.bilkent.edu.tr\/tr\/math-semineri-nonextension-of-pluricanonical-forms-in-positive-and-mixed-characteristic-iacopo-brivio-1700-19-kasim-2025-en\/","title":{"rendered":"MATH Semineri: &#8220;(Non)extension of Pluricanonical Forms in Positive and Mixed Characteristic\u201d, Iacopo Brivio, 17:00 19 Kas\u0131m 2025 (EN)"},"content":{"rendered":"<p>You are cordially invited to the seminars organized by the Department of Mathematics.<\/p>\n<p>Speaker: by Iacopo Brivio (Harvard)<\/p>\n<p>&#8220;(Non)extension of pluricanonical forms in positive and mixed characteristic&#8221;<\/p>\n<p>Abstract: A famous theorem by Siu states that if X&#8212;&gt;C is a smooth projective family of algebraic varieties, then any m-pluricanonical forms on a fiber X_c extends to the total space. This theorem, and the techniques involved in its proof, have been extremely important in the development of higher dimensional algebraic geometry. However, Siu&#8217;s argument is deeply analytic and it does not generalize to positive and mixed characteristic. In this talk I will discuss counterexamples to Siu&#8217;s theorem and their consequences, as well as a weakening of it, valid in positive and mixed characteristic, and an application to boundedness of canonically polarized 3folds.<\/p>\n<p>Date: November 19, Wednesday<br \/>\nTime: 17:00 (Turkey)<br \/>\nPlace: Zoom<\/p>\n<p>To request the event link, please send a message to turker.ozsari@bilkent.edu.tr<\/p>\n","protected":false},"excerpt":{"rendered":"<p>You are cordially invited to the seminars organized by the Department of Mathematics. Speaker: by Iacopo Brivio (Harvard) &#8220;(Non)extension of pluricanonical forms in positive and mixed characteristic&#8221; Abstract: A famous theorem by Siu states that if X&#8212;&gt;C is a smooth projective family of algebraic varieties, then any m-pluricanonical forms on [\u2026] <\/p>\n<div class=\"clear\"><\/div>\n<p><a class=\"more_link clearfix\" href=\"https:\/\/w3.bilkent.edu.tr\/tr\/math-semineri-nonextension-of-pluricanonical-forms-in-positive-and-mixed-characteristic-iacopo-brivio-1700-19-kasim-2025-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":[22],"tags":[],"class_list":["post-36098","post","type-post","status-publish","format-standard","hentry","category-eskipostlar"],"_links":{"self":[{"href":"https:\/\/w3.bilkent.edu.tr\/tr\/wp-json\/wp\/v2\/posts\/36098","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/w3.bilkent.edu.tr\/tr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/w3.bilkent.edu.tr\/tr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/w3.bilkent.edu.tr\/tr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/w3.bilkent.edu.tr\/tr\/wp-json\/wp\/v2\/comments?post=36098"}],"version-history":[{"count":1,"href":"https:\/\/w3.bilkent.edu.tr\/tr\/wp-json\/wp\/v2\/posts\/36098\/revisions"}],"predecessor-version":[{"id":36099,"href":"https:\/\/w3.bilkent.edu.tr\/tr\/wp-json\/wp\/v2\/posts\/36098\/revisions\/36099"}],"wp:attachment":[{"href":"https:\/\/w3.bilkent.edu.tr\/tr\/wp-json\/wp\/v2\/media?parent=36098"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/w3.bilkent.edu.tr\/tr\/wp-json\/wp\/v2\/categories?post=36098"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/w3.bilkent.edu.tr\/tr\/wp-json\/wp\/v2\/tags?post=36098"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}