Dr. Arunima Ray (Max-Planck-Institut für Mathematik, Germany)

2/14/2022:  10:00 am

Abstract:  When is a given map of a surface to a 4-manifold homotopic to an embedding?  I'll motivate this question and give a survey of related results, including the celebrated work of Freedman and Quinn, and culminating in a general surface embedding theorem.  The talk will be based on joint work with Kaniel Kasprowski, Mark Powell, and Peter Teichner.