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arXiv 1708.09583math.DGmath.AP
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双曲空间中保质量积分的曲率流

Quermassintegral preserving curvature flow in Hyperbolic space

Ben Andrews, Yong Wei

摘要:

考虑双曲空间中闭\emph{h-convex}超曲面的保quermass积分流,其速度由主曲率的一次齐次对称、严格增的光滑函数$f$的任意正幂给出,该函数是反凹的,其对偶$f_*$在正锥边界上趋于零.证明了若初始超曲面为\emph{h-convex},则流的解成为严格的\emph{h-convex},对于$t>0$,流始终存在且在光滑拓扑下指数收敛于测地球.

英文摘要:

We consider the quermassintegral preserving flow of closed \emph{h-convex} hypersurfaces in hyperbolic space with the speed given by any positive power of a smooth symmetric, strictly increasing, and homogeneous of degree one function $f$ of the principal curvatures which is inverse concave and has dual $f_*$ approaching zero on the boundary of the positive cone. We prove that if the initial hypersurface is \emph{h-convex}, then the solution of the flow becomes strictly \emph{h-convex} for $t>0$, the flow exists for all time and converges to a geodesic sphere exponentially in the smooth topology.

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