New Logarithmic Sobolev Inequalities and an ε-Regularity Theorem for the Ricci Flow
New Logarithmic Sobolev Inequalities and an ε-Regularity Theorem for the Ricci Flow
复制标题
DOI:
10.1002/cpa.21474
复制
发表时间:
2014-09-01
影响因子:
3
通讯作者:
Naber, Aaron
中科院分区:
文献类型:
--
作者:
Hein, Hans-Joachim;Naber, Aaron
In this note, we prove an epsilon-regularity theorem for the Ricci flow. Let (M-n, g(t)) with t is an element of [-T, 0] be a Ricci flow, and let H-x0 (y, s) be the conjugate heat kernel centered at some point (x(0), 0) in the final time slice. By substituting H-x0 (-, s) into Perelman's W-functional, we obtain a monotone quantity W-x0(s) that we refer to as the pointed entropy. This satisfies W-x0(s) 0, depending only on T and on lower scalar curvature and mu-entropy bounds for the initial slice (M-n, g(-T)) such that W-x0(s) >= -epsilon implies vertical bar Rm vertical bar