{"id":5727,"date":"2022-06-29T14:17:34","date_gmt":"2022-06-29T12:17:34","guid":{"rendered":"https:\/\/www.dm.unipi.it\/?post_type=unipievents&#038;p=5727"},"modified":"2022-07-01T12:24:20","modified_gmt":"2022-07-01T10:24:20","slug":"gruppi-liberi-e-stallings-folding","status":"publish","type":"unipievents","link":"https:\/\/www.dm.unipi.it\/en\/eventi\/gruppi-liberi-e-stallings-folding\/","title":{"rendered":"Free groups and Stallings&#8217; folding &ndash; Dario Ascari (Oxford University)"},"content":{"rendered":"\n<p>The operation of folding on graphs, introduced for the first time by Stallings, is a fundamental tool in studying many properties of free groups. During the talk, we introduce this notion and we show some of its first and most important applications: these include the solution to the subgroup membership problem, Marshall Hall&#8217;s theorem and Howson&#8217;s theorem.<\/p>\n\n\n\n<p>Further information is available on the <a href=\"http:\/\/people.dm.unipi.it\/babygeometri\/english\/_site\/index.html\">babygeometri website<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>L&#8217;operazione di folding sui grafi, introdotta da Stallings, \u00e8 uno strumento fondamentale nello studio di varie propriet\u00e0 dei gruppi liberi.&hellip;<\/p>\n<p><a class=\"btn btn-dark btn-sm unipi-read-more-link\" href=\"https:\/\/www.dm.unipi.it\/en\/eventi\/gruppi-liberi-e-stallings-folding\/\">Read More&#8230;<\/a><\/p>\n","protected":false},"author":33,"featured_media":0,"template":"","tags":[],"unipievents_taxonomy":[],"class_list":["post-5727","unipievents","type-unipievents","status-publish","hentry"],"acf":[],"unipievents_startdate":1657031400,"unipievents_enddate":1657035000,"unipievents_place":"Aula Bianchi Lettere - Palazzo della Carovana","unipievents_externalid":0,"jetpack_sharing_enabled":true,"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"_links":{"self":[{"href":"https:\/\/www.dm.unipi.it\/en\/wp-json\/wp\/v2\/unipievents\/5727","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\/33"}],"version-history":[{"count":6,"href":"https:\/\/www.dm.unipi.it\/en\/wp-json\/wp\/v2\/unipievents\/5727\/revisions"}],"predecessor-version":[{"id":5744,"href":"https:\/\/www.dm.unipi.it\/en\/wp-json\/wp\/v2\/unipievents\/5727\/revisions\/5744"}],"wp:attachment":[{"href":"https:\/\/www.dm.unipi.it\/en\/wp-json\/wp\/v2\/media?parent=5727"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dm.unipi.it\/en\/wp-json\/wp\/v2\/tags?post=5727"},{"taxonomy":"unipievents_taxonomy","embeddable":true,"href":"https:\/\/www.dm.unipi.it\/en\/wp-json\/wp\/v2\/unipievents_taxonomy?post=5727"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}