学术报告
Tightly covering, small excess and sphere theorem-万建明教授（西北大学，西安）
作者：
时间： 2017-04-19
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题目：Tightly covering, small excess and sphere theorem
报告人：万建明（西北大学，西安）
Abstract：
We provide natural optimal geometric conditions for a Riemannian manifold suitably covered by two open metric balls to be homeomorphic to a sphere. This can be viewed as a geometric analogue of Brown’s theorem in topology stating that a closed manifold covered by two topological balls is a sphere.
时间：4月19日(周三)上午11:00-12:00
地点：首师大校本部新教二楼611
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