{"id":2007,"date":"2022-04-29T11:13:47","date_gmt":"2022-04-29T09:13:47","guid":{"rendered":"https:\/\/www.dm.unipi.it\/eventi\/surfaces-with-close-to-irrational-seshadri-constants-sonke-rollenske-universitat-marburg\/"},"modified":"2022-04-29T11:13:47","modified_gmt":"2022-04-29T09:13:47","slug":"surfaces-with-close-to-irrational-seshadri-constants-sonke-rollenske-universitat-marburg","status":"publish","type":"unipievents","link":"https:\/\/www.dm.unipi.it\/en\/eventi\/surfaces-with-close-to-irrational-seshadri-constants-sonke-rollenske-universitat-marburg\/","title":{"rendered":"Surfaces with close to irrational Seshadri constants &#8211; S\u00f6nke Rollenske (Universit\u00e4t Marburg)"},"content":{"rendered":"<h4>Venue<\/h4>\n<p>Dipartimento di Matematica, Aula Seminari.<\/p>\n<h4 class='mt-4'>Abstract<\/h4>\n<p>Seshadri constants measure local positivity of line bundles and it is an open question if they can be irrational on algebraic surfaces. I will recall this concept and prove that for a general point on a general hypersurface of degree $md$ in $\\mathbb{P}(1,1,1,m)$ the Seshadri constant $\\epsilon (\\mathcal{O}_X(1), x)$ approaches the possibly irrational number $\\sqrt d$ as $m$ grows ($d &gt;1$ and $m&gt;2$). This is joint work with A. K\u00fcronya.<\/p>\n<p class='mt-4'>Further information is available on the <a href=\"https:\/\/events.dm.unipi.it\/event\/59\/\">event page<\/a> on the Indico platform.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Seshadri constants measure local positivity of line bundles and it is an open question if they can be irrational on algebraic surfaces. I will recall this concept and prove that for a general point on a general hypersurface of degree $md$ in&hellip;<\/p>\n<p><a class=\"btn btn-dark btn-sm unipi-read-more-link\" href=\"https:\/\/www.dm.unipi.it\/en\/eventi\/surfaces-with-close-to-irrational-seshadri-constants-sonke-rollenske-universitat-marburg\/\">Read More&#8230;<\/a><\/p>\n","protected":false},"author":6,"featured_media":0,"template":"","tags":[],"unipievents_taxonomy":[],"class_list":["post-2007","unipievents","type-unipievents","status-publish","hentry"],"acf":[],"unipievents_startdate":1631718000,"unipievents_enddate":1631721600,"unipievents_place":"Dipartimento di Matematica, Aula Seminari.","unipievents_externalid":59,"jetpack_sharing_enabled":true,"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"_links":{"self":[{"href":"https:\/\/www.dm.unipi.it\/en\/wp-json\/wp\/v2\/unipievents\/2007","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dm.unipi.it\/en\/wp-json\/wp\/v2\/unipievents"}],"about":[{"href":"https:\/\/www.dm.unipi.it\/en\/wp-json\/wp\/v2\/types\/unipievents"}],"author":[{"embeddable":true,"href":"https:\/\/www.dm.unipi.it\/en\/wp-json\/wp\/v2\/users\/6"}],"version-history":[{"count":0,"href":"https:\/\/www.dm.unipi.it\/en\/wp-json\/wp\/v2\/unipievents\/2007\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.dm.unipi.it\/en\/wp-json\/wp\/v2\/media?parent=2007"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dm.unipi.it\/en\/wp-json\/wp\/v2\/tags?post=2007"},{"taxonomy":"unipievents_taxonomy","embeddable":true,"href":"https:\/\/www.dm.unipi.it\/en\/wp-json\/wp\/v2\/unipievents_taxonomy?post=2007"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}