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arXiv 2004.02518math.GTmath.DG

以偶维球面空间形为纤维的丛及纤维向四分之一夹挤黎曼度量

Bundles with even-dimensional spherical space form as fibers and fiberwise quarter pinched Riemannian metrics

Diego Corro, Karla Garcia, Martin Günther, Jan-Bernhard Kordaß

AI总结:

本文证明:若光滑丛的每个纤维(实射影空间)带有连续变化的正曲率逐点强1/4夹挤度量,则丛的结构群可约化为标准圆度量的等距群。

摘要:

设$E$是一个纤维为$n$维实射影空间$\mathbb{R}P^n$的光滑丛。我们证明,如果每个纤维都带有一个正曲率的逐点强$1/4$夹挤黎曼度量,且该度量关于其基点连续变化,则丛的结构群可约化为$\mathbb{R}P^n$上标准圆度量的等距群。

英文摘要:

Let $E$ be a smooth bundle with fiber an $n$-dimensional real projective space $\mathbb{R}P^n$. We show that, if every fiber carries a positively curved pointwise strongly $1/4$-pinched Riemannian metric that varies continuously with respect to its base point, then the structure group of the bundle reduces to the isometry group of the standard round metric on $\mathbb{R}P^n$.

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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