I am speaking. My title and abstract are below: Title: Three sphere recognition modulo GRH Speaker: Neil Hoffman Date: Oct 15, 2019 Time: 3:30 PM Room: MSCS 509 Abstract: In this largely expository talk, I will discuss the interplay between the Generalized Riemann Hypothesis and the problem of producing a relatively small sized certificate that a 3-manifold is not the three sphere. ______________________ Neil R. Hoffman Assistant Professor Department of Mathematics 523 Math Science Building Oklahoma State University Stillwater, OK 74078-1058 405-744-7791 http://math.okstate.edu/people/nhoffman