科学研究
报告题目:

An Anisotropic shrinking flow and L_p Minkowski problem

报告人:

盛为民 教授(浙江大学)

报告时间:

报告地点:

理学院东北楼二楼报告厅(209)

报告摘要:

In this talk, I will introduce my recent work with Caihong Yi on studying anisotropic shrinking flows and the application on L_p Minkowski problem. We consider an shrinking flow of smooth, closed, uniformly convex hypersurfaces in Euclidean R^{n+1} with speed fu^\alpha\sigma_n^{-\beta}, where u is the support function of the hypersurface, \alpha and \beta are two real numbers, and \beta>0, \sigma_n is the n-th symmetric polynomial of the principle curvature radii of the hypersurface. We prove that the flow exists an unique smooth solution for all time and converges smoothly after normalization to a smooth solution of the equation fu^{\alpha-1}\sigma_n^{-\beta}=c provided the initial hypersuface is origin-symmetric and f is a smooth positive even function on S^n for some cases of \alpha and \beta. In the case \alpha>= 1+n\beta, \beta>0, we prove that the flow converges smoothly after normalization to a unique smooth solution of fu^{\alpha-1}\sigma_n^{-\beta}=c without any constraint on the initial hypersuface and the function f. When \beta=1, our argument provides a uniform proof to the existence of the solutions to the L_p Minkowski problem u^{1-p}\sigma_n=\phi for p\in(-n-1,+\infty) where \phi is a smooth positive function on S^n.