Asymptotic convergence for a class of anisotropic curvature flows

Asymptotic convergence for a class of anisotropic curvature flows
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一类各向异性曲率流的渐近收敛

DOI:
10.1016/j.jfa.2022.109460
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发表时间:
2021-03
影响因子:
1.7
通讯作者:
Ruijia Zhang
Ruijia Zhang
中科院分区:
数学1区
文献类型:
--
作者:
Haizhong Li;Botong Xu;Ruijia Zhang

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利用新的辅助函数,研究了Rn + 1中一类闭星形超曲面的收缩流,速度为r α β σ k1 β,其中σ k为主曲率的k阶初等对称多项式,α,β为正常数,r为超曲面上的点到原点的距离.在k,α,β的一些假设下,得到了收敛结果.当k≥ 2,0< β≤ 1,α≥ β+ k时,证明了该流的k-凸解始终存在,并且在正规化后光滑收敛于球面,特别地,我们将Li-Sheng-Wang的结果从一致凸推广到k-凸.当k≥ 2,β= k,α≥ 2k时,证明了该流的k-凸解始终存在,且正规化后光滑收敛于球面,特别地,将Ling Xiao的结果从k= 2推广到k≥ 2.
In this paper, by using new auxiliary functions, we study a class of contracting flows of closed, star-shaped hypersurfaces in R n+ 1 with speed r α β σ k 1 β, where σ k is the k-th elementary symmetric polynomial of the principal curvatures, α, β are positive constants and r is the distance from points on the hypersurface to the origin. We obtain convergence results under some assumptions of k, α, β. When k≥ 2, 0< β≤ 1, α≥ β+ k, we prove that the k-convex solution to the flow exists for all time and converges smoothly to a sphere after normalization, in particular, we generalize Li-Sheng-Wang's result from uniformly convex to k-convex. When k≥ 2, β= k, α≥ 2 k, we prove that the k-convex solution to the flow exists for all time and converges smoothly to a sphere after normalization, in particular, we generalize Ling Xiao's result from k= 2 to k≥ 2.
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