摘要
We consider the inverse curvature flows of smooth,closed and strictly convex rotation hypersurfaces in space forms M_(κ)^(n+1)with speed function given by F^(-α),whereα∈(0,1]forκ=0,-1,α=1 forκ=1 and F is a smooth,symmetric,strictly increasing and 1-homogeneous function of the principal curvatures of the evolving hypersurfaces.We show that the curvature pinching ratio of the evolving hypersurface is controlled by its initial value,and prove the long time existence and convergence of the flows.No second derivatives conditions are required on F.
基金
Supported by the National Key R and D Program of China(Grant No.2020YFA0713100)
National Natural Science Foundation of China(Grant Nos.11971244 and 11871283)
Natural Science Foundation of Tianjin,China(Grant No.19JCQNJC14300)
Research(Grant No.KY0010000052)from University of Science and Technology of China。
