Dear Colleagues and Students,<\/p>\n
You are cordially invited to the Topology Seminar organized by the Department of Mathematics.<\/p>\n
Speaker: Ian Hambleton (McMaster University)<\/p>\n
\u201cGroup actions on homology 3-spheres\u201d<\/p>\n
Abstract: I will discuss finite group actions on integral or rational homology 3-spheres. The main examples for this talk are the Brieskorn integral homology 3-spheres $M(p,q,r)$ arising from isolated singularities, which bound smooth 4-manifolds with definite intersection forms. In addition, there are special infinite families of Brieskorn homology 3-spheres which can be realized as boundaries of smooth contractible 4-manifolds. We ask whether the periodic actions on Brieskorn spheres extend to smooth actions with isolated fixed points on one of these associated 4-manifolds. This is joint work with Nima Anvari.<\/p>\n
Date: October 21, 2019
\nTime: 13:40
\nPlace: Mathematics Seminar Room, SA \u2013 141<\/p>\n","protected":false},"excerpt":{"rendered":"
Dear Colleagues and Students, You are cordially invited to the Topology Seminar organized by the Department of Mathematics. Speaker: Ian Hambleton (McMaster University) \u201cGroup actions on homology 3-spheres\u201d Abstract: I will discuss finite group actions on integral or rational homology 3-spheres. The main examples for this talk are the Brieskorn [\u2026] <\/p>\n