Tuesday, September 8, 2020
3:00pm to 4:00pm


Math Seminar Series
(Conferences / Seminars / Lectures)
Geometry and Topology
Yi Ni from Caltech, will be speaking on the topic of Thurston norm minimizing Seifert surfaces.
Place: Online (virtual meeting)
Let K be a nullhomologous knot in a closed 3manifold Y, and F be a Seifert surface. One can cap off the boundary of F with a disk in the zero surgery on K to get a closed surface F_0. If we know that F is Thurston norm minimizing, we can ask whether F_0 is also Thurston norm minimizing. A classical theorem of Gabai says that the answer is Yes when Y is the 3sphere. Gabai's theorem can be generalized to many other 3manifolds using Heegaard Floer homology. In this talk, we will discuss a sufficient condition for F_0 to be Thurston norm minimizing which relates this property to the 4genus of the knot. more information...
Location: 
Go to Seminars Page for Zoom link and password [map] 
Price: 
free 
Sponsor: 
Department of Mathematics 
Contact: 
Department of Mathematics (517) 3530844 



