Rotational Symmetry of Asymptotically Conical Mean Curvature Flow   Self-Expanders
  In this article, we examine complete, mean-convex self-expanders for the mean curvature flow whose ends have decaying principal curvatures. We prove a Liouville-type theorem associated to this class of self-expanders. As an application, we show that mean-convex self-expanders which are asymptotic to $O(n)$-invariant cones are rotationally symmetric. 
Frederick Tsz-Ho Fong, Peter McGrath
math.DG math.AP