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
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。