具有几乎处处正曲率的黎曼流形例子
微分几何
2014-11-11 v1
摘要
我们证明了 S^4 的单位切丛和一个实上同调 CP^3 容许几乎处处具有正截面曲率的黎曼度量。这些是目前仅有的几乎处处正曲率且不为人所知也容许正曲率的例子。
引用
@article{arxiv.math/9910187,
title = {Examples of Riemannian manifolds with positive curvature almost everywhere},
author = {Peter Petersen and Frederick Wilhelm},
journal= {arXiv preprint arXiv:math/9910187},
year = {2014}
}
备注
37 pages. Published copy, also available at http://www.maths.warwick.ac.uk/gt/GTVol3/paper14.abs.html