## Seminars and Colloquia by Series

Monday, November 6, 2017 - 13:55 , Location: TBA , TBA , TBA , Organizer: Caitlin Leverson
Monday, October 2, 2017 - 13:55 , Location: Skiles 006 , TBA , TBA , Organizer: Caitlin Leverson
Monday, September 18, 2017 - 13:50 , Location: Skiles 006 , Michael Landry , Yale , , Organizer: Balazs Strenner
Monday, September 11, 2017 - 13:55 , Location: Skiles 006 , TBA , TBA , Organizer: Caitlin Leverson
Monday, August 28, 2017 - 13:50 , Location: Skiles 006 , Juliette Bavard , University of Chicago , Organizer: Balazs Strenner
Monday, August 7, 2017 - 14:05 , Location: Skiles 006 , Ingrid Irmer , University of Melbourne , Organizer: Stavros Garoufalidis
Not yet
Tuesday, June 27, 2017 - 14:05 , Location: Skiles 006 , Lei Chen , University of Chicago , Organizer: Dan Margalit
I will talk about homomorphisms between surface braid groups. Firstly, we will see that any surjective homomorphism from PB_n(S) to PB_m(S) factors through a forgetful map. Secondly, we will compute the automorphism group of PB_n(S). It turns out to be the mapping class group when n>1.
Friday, June 23, 2017 - 10:00 , Location: Skiles 006 , , Temple University , , Organizer: Justin Lanier
Certain fibered hyperbolic 3-manifolds admit a layered veering triangulation, which can be constructed algorithmically given the stable lamination of the monodromy. These triangulations were introduced by Agol in 2011, and have been further studied by several others in the years since. We present experimental results which shed light on the combinatorial structure of veering triangulations, and its relation to certain topological invariants of the underlying manifold. We will begin by discussing essential background material, including hyperbolic manifolds and ideal triangulations, and more particularly fibered hyperbolic manifolds and the construction of the veering triangulation.
Tuesday, June 20, 2017 - 14:05 , Location: Skiles 006 , Dan Margalit and Justin Lanier , Georgia Tech , Organizer: Justin Lanier
We give a simple geometric criterion for an element to normally generate the mapping class group of a surface. As an application of this criterion, we show that when a surface has genus at least 3, every periodic mapping class except for the hyperelliptic involution normally generates. We also give examples of pseudo-Anosov elements that normally generate when genus is at least 2, answering a question of D. Long.
Monday, May 8, 2017 - 14:00 , Location: Skiles 006 , Tye Lidman , NCSU , Organizer: Jennifer Hom
We will discuss a relation between some notions in three-dimensional topology and four-dimensional aspects of knot theory.