Special Session 50: 

Uniqueness of critical points of the anisotropic isoperimetric problem

Antonio De Rosa
Courant Institute of Mathematical Sciences, New York University
USA
Co-Author(s):    Mario Santilli and Slawomir Kolasinski
Abstract:
The anisotropic isoperimetric problem consists in enclosing a prescribed volume in a closed hypersurface with least anisotropic energy. Although its solutions, referred to as Wulff shapes, are well understood, the characterization of the associated critical points is more subtle. In this talk we present a uniqueness result: Given an elliptic integrand of class $C^3$, we prove that finite unions of disjoint (but possibly mutually tangent) open Wulff shapes with equal radii are the only volume-constrained critical points of the anisotropic surface energy among all sets with finite perimeter and reduced boundary almost equal to its closure.