题目(Title)：Surfaces moving by powers of Gauss curvature
报告人： 陈旭忠 博士后 （清华大学）
地点： 闵行数学系102报告厅
时间： 12月21日（周三） 13：00-14：00
摘要(Abstract)：
In this talk, we will consider surfaces moving by powers of Gauss curvature in three-dimensional Euclidean space. We prove that strictly convex surfaces moving by $K^{\alpha/2}$ become spherical as they contract to points, provided $\alpha$ lies in the range $[1,2]$. In the process we provide a natural candidate for a curvature pinching quantity for surfaces moving by arbitrary functions of curvature, by finding a quantity conserved by the reaction terms in the evolution of curvature.