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Talk_id	Date	Speaker	Title
13345	Thursday 9/6 2:00 PM	Alex Waldron, MSU	Yang-Mills flow in dimension four New Window Geometry and Topology Speaker: Alex Waldron, MSU Title: Yang-Mills flow in dimension four Date: 09/06/2018 Time: 2:00 PM - 3:00 PM Place: C304 Wells Hall Among the classical geometric evolution equations, YM flow is the least nonlinear and best behaved. Nevertheless, curvature concentration is a subtle problem when the base manifold has dimension four. I'll discuss my proof that finite-time singularities do not occur, and briefly describe the infinite-time picture.
13292	Thursday 9/13 2:00 PM	Rita Gitik, Michigan	On Tame Subgroups of Finitely Presented Groups New Window Geometry and Topology Speaker: Rita Gitik, Michigan Title: On Tame Subgroups of Finitely Presented Groups Date: 09/13/2018 Time: 2:00 PM - 2:50 PM Place: C304 Wells Hall We describe several examples of tame subgroups of finitely presented groups and prove that the fundamental groups of certain finite graphs of groups are locally tame.
15396	Thursday 9/27 2:00 PM	Giuseppe Martone, University of Michigan	Hitchin representations and positive configurations of apartments New Window Geometry and Topology Speaker: Giuseppe Martone, University of Michigan Title: Hitchin representations and positive configurations of apartments Date: 09/27/2018 Time: 2:00 PM - 3:00 PM Place: C304 Wells Hall Hitchin singled out a preferred component in the character variety of representations from the fundamental group of a surface to PSL(d,R). When d=2, this Hitchin component coincides with the Teichm\"uller space consisting of all hyperbolic metrics on the surface. Later Labourie showed that Hitchin representations share many important differential geometric and dynamical properties. Parreau extended previous work of Thurston and Morgan-Shalen to a compactification of the Hitchin component whose boundary points are described by actions of the fundamental group of the surface on a building. In this talk, we offer a new point of view for the Parreau compactification, which is based on certain positivity properties discovered by Fock and Goncharov. Specifically, we use the Fock-Goncharov construction to describe the intersection patterns of apartments in invariant subsets of the building that arises in the boundary of the Hitchin component.
14370	Thursday 10/4 2:00 PM	Artem Kotelskiy, Indiana University	TBA New Window Geometry and Topology Speaker: Artem Kotelskiy, Indiana University Title: TBA Date: 10/04/2018 Time: 2:00 PM - 2:50 PM Place: C304 Wells Hall No abstract available.
15379	Thursday 10/11 2:00 PM	Matthew Stoffregen, MIT	An infinite-rank summand of the homology cobordism group New Window Geometry and Topology Speaker: Matthew Stoffregen, MIT Title: An infinite-rank summand of the homology cobordism group Date: 10/11/2018 Time: 2:00 PM - 3:00 PM Place: C304 Wells Hall This talk explains a generalization of the techniques that Hom introduced to construct an infinite-rank summand of the topologically slice knot concordance group. We generalize Hom's epsilon-invariant to the involutive Heegaard Floer homology constructed by Hendricks-Manolescu. As an application, we see that there is an infinite-rank summand of the homology cobordism group, generated by Seifert spaces. The talk will contain a review of involutive Floer homology. This is joint work with Irving Dai, Jen Hom, and Linh Truong.
15386	Thursday 10/25 2:00 PM	William Worden, Rice University	TBA New Window Geometry and Topology Speaker: William Worden, Rice University Title: TBA Date: 10/25/2018 Time: 2:00 PM - 3:00 PM Place: C304 Wells Hall No abstract available.
15387	Thursday 11/1 2:00 PM	Yuanqi Wang	TBA New Window Geometry and Topology Speaker: Yuanqi Wang Title: TBA Date: 11/01/2018 Time: 2:00 PM - 3:00 PM Place: C304 Wells Hall No abstract available.
13346	Thursday 11/8 2:00 PM	Jonathan Campbell, Vanderbilt University	TBA New Window Geometry and Topology Speaker: Jonathan Campbell, Vanderbilt University Title: TBA Date: 11/08/2018 Time: 2:00 PM - 3:00 PM Place: C304 Wells Hall No abstract available.
14374	Thursday 11/15 2:00 PM	Ian Zemke, Princeton University	TBA New Window Geometry and Topology Speaker: Ian Zemke, Princeton University Title: TBA Date: 11/15/2018 Time: 2:00 PM - 3:00 PM Place: C304 Wells Hall No abstract available.
15380	Thursday 11/29 2:00 PM	Dominic Culver, University of Illinois Urbana-Champaign	TBA New Window Geometry and Topology Speaker: Dominic Culver, University of Illinois Urbana-Champaign Title: TBA Date: 11/29/2018 Time: 2:00 PM - 3:00 PM Place: C304 Wells Hall No abstract available.
15397	Thursday 12/6 2:00 PM	Lev Tovstopyat-Nelip , Boston College	TBA New Window Geometry and Topology Speaker: Lev Tovstopyat-Nelip , Boston College Title: TBA Date: 12/06/2018 Time: 2:00 PM - 2:50 PM Place: C304 Wells Hall No abstract available.

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Department of Mathematics
Michigan State University
619 Red Cedar Road
C212 Wells Hall
East Lansing, MI 48824
Phone: (517) 353-0844
Fax: (517) 432-1562

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