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arXiv 2103.11970math.DG
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积分曲率有界且无正eigenvalue下界的流形

Manifolds with bounded integral curvature and no positive eigenvalue lower bounds

Connor C. Anderson, Xavier Ramos Olivé, Kamryn Spinelli

摘要:

我们提供了一个明确的建设一个序列的闭曲面上的直径和$L^p$规范的曲率上的统一界限,但没有一个积极的下界的第一个非零特征值的拉普拉斯$λ_1$。这个例子表明,曲率的$L^p$范数的小性假设是在积分曲率条件下导出Lichnerowicz和Zhong-Yang型估计的必要条件.

英文摘要:

We provide an explicit construction of a sequence of closed surfaces with uniform bounds on the diameter and on $L^p$ norms of the curvature, but without a positive lower bound on the first non-zero eigenvalue of the Laplacian $λ_1$. This example shows that the assumption of smallness of the $L^p$ norm of the curvature is a necessary condition to derive Lichnerowicz and Zhong-Yang type estimates under integral curvature conditions.

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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