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arXiv 1107.4262math.DGmath.AP
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里奇流下测地线球体积增长的边界

Bounds on volume growth of geodesic balls under Ricci flow

Qi S. Zhang

摘要:

证明了里奇流的$κ$非膨胀性质,在数量曲率的上界下,给出了测地球与欧氏球的体积比的上界.这一结果可以看作是Perelman关于里奇流的$κ$非坍缩性质的相反陈述。这两个结果共同暗示了里奇流的体积加倍性质,而不需要假定里奇曲率的下界。

英文摘要:

We prove a so called $κ$ non-inflating property for Ricci flow, which provides an upper bound for volume ratio of geodesic balls over Euclidean ones, under an upper bound for scalar curvature. This result can be regarded as the opposite statement of Perelman's $κ$ non-collapsing property for Ricci flow. These two results together imply volume doubling property for Ricci flow without assuming Ricci curvature lower bound.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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