{"id":3331,"date":"2017-08-20T23:02:25","date_gmt":"2017-08-20T21:02:25","guid":{"rendered":"https:\/\/projects.illc.uva.nl\/lgc\/seminar\/?p=3331"},"modified":"2017-08-27T20:11:58","modified_gmt":"2017-08-27T18:11:58","slug":"lira-session-aybuke-ozgun-and-ana-lucia-vargas-sandoval","status":"publish","type":"post","link":"https:\/\/projects.illc.uva.nl\/lgc\/seminar\/2017\/08\/lira-session-aybuke-ozgun-and-ana-lucia-vargas-sandoval\/","title":{"rendered":"LIRa session: Ayb\u00fcke \u00d6zg\u00fcn and Ana Lucia Vargas Sandoval"},"content":{"rendered":"<p>Speakers: <a href=\"https:\/\/sites.google.com\/site\/ozgunaybuke\/\">Ayb\u00fcke \u00d6zg\u00fcn<\/a> and <a href=\"http:\/\/www.illc.uva.nl\/People\/show_person.php?Person_id=Vargas+Sandoval+A.L.\">Ana Lucia Vargas Sandoval<\/a> (ILLC, Amsterdam)<\/p>\n<p>Date and Time: Monday, September&nbsp;4th 2017, 13:00-14:30<\/p>\n<p>Venue: ILLC Seminar Room F1.15, Science Park 107.<\/p>\n<p>Title:\u00a0<strong>Topo-Logic as a dynamic-epistemic logic (toward a logic for Learning Theory).<\/strong><\/p>\n<p><em>Abstract<\/em>. In this talk, we investigate a natural extension of Topo-Logic of Moss and Parikh (1992), obtained by adding to it dynamic modalities for \u2018topological public announcements\u2019 in the style of Bjorndahl (2017). In other words, we revisit Topo-Logic as a dynamic epistemic logic with public announcements. The resulting \u201cDynamic Topo-Logic\u201d forms a logic of <em>evidence-based knowledge, knowability, learning of new evidence<\/em>, and <em>stability<\/em> (of some truth \u03c6) under any further (true) evidence-acquisition. Moreover, we also talk about a topological arbitrary announcement modality studied by van Ditmarsch et al. (2015), and investigate its interplay with the effort modality. We therefore develop a formal, topological framework that clarifies the intuitively obvious, yet formally elusive connection between the dynamic notions effort and its seemingly special instances: public and arbitrary announcements.<\/p>\n<p>We give a complete axiomatization for this Dynamic Topo-Logic, which is \u2014 we argue \u2014 epistemically more intuitive and, in a sense, simpler than the standard axioms of Topo-Logic. Our completeness proof is also more direct, making use of a standard canonical model construction. Moreover, we study the relations between this extension and other known logical formalisms, showing in particular that it is co-expressive with the simpler and older logic of interior and global modality, which immediately provides an easy decidability proof both for the original Topo-Logic and for our extension. In turn, the effort modality also helps to simplify and streamline the axiomatization of the topological arbitrary announcement logic.<br \/>\nIf time permits, we also discuss a variant of the Dynamic Topo-Logic as a Dynamic Logic for Learning Theory, and use it to characterize various notions of knowledge, belief, and learning.<\/p>\n<p>The first part of the talk is joint work with Alexandru Baltag, and the second part is joint work with Alexandru Baltag, Nina Gierasimczuk, and Sonja Smets.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Speakers: Ayb\u00fcke \u00d6zg\u00fcn and Ana Lucia Vargas Sandoval (ILLC, Amsterdam)<br \/>\nDate and Time: Monday, September&nbsp;4th 2017, 13:00-14:30<br \/>\nVenue: ILLC Seminar Room F1.15, Science Park 107.<br \/>\nTitle:\u00a0Topo-Logic as a dynamic-epistemic logic (toward a logic for Learning Theory).<br \/>\nAbstract. In this talk, we investigate a natural extension of Topo-Logic of Moss and Parikh (1992), obtained by adding to it dynamic modalities [&#8230;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-3331","post","type-post","status-publish","format-standard","hentry","category-events"],"_links":{"self":[{"href":"https:\/\/projects.illc.uva.nl\/lgc\/seminar\/wp-json\/wp\/v2\/posts\/3331","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/projects.illc.uva.nl\/lgc\/seminar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/projects.illc.uva.nl\/lgc\/seminar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/projects.illc.uva.nl\/lgc\/seminar\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/projects.illc.uva.nl\/lgc\/seminar\/wp-json\/wp\/v2\/comments?post=3331"}],"version-history":[{"count":4,"href":"https:\/\/projects.illc.uva.nl\/lgc\/seminar\/wp-json\/wp\/v2\/posts\/3331\/revisions"}],"predecessor-version":[{"id":3342,"href":"https:\/\/projects.illc.uva.nl\/lgc\/seminar\/wp-json\/wp\/v2\/posts\/3331\/revisions\/3342"}],"wp:attachment":[{"href":"https:\/\/projects.illc.uva.nl\/lgc\/seminar\/wp-json\/wp\/v2\/media?parent=3331"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/projects.illc.uva.nl\/lgc\/seminar\/wp-json\/wp\/v2\/categories?post=3331"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/projects.illc.uva.nl\/lgc\/seminar\/wp-json\/wp\/v2\/tags?post=3331"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}