EVENT DETAILS AND ABSTRACT

Title: Faces of the stable commutator length norm ball
Speaker: Danny Calegari
Speaker Info: Caltech
Brief Description:
Special Note:
Abstract:

It often happens that a solution of an extremal problem in geometry has more regularity and nicer features than one has an a priori right to expect. I will show how a simple topological problem - when does an immersed curve on a surface bound an immersed subsurface? - is unexpectedly related to linear programming in nonseparable Banach spaces, and gives rise to geometric and dynamical rigidity and discreteness of symplectic representations.