 セミナー情報
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2013年 8月5日（月）〜8月9日（金）
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| 8月6日(火) |
■幾何セミナー 16:30--18:00【会場：数学棟305】*通常と開始時間が異なります。
講演者：Xiaochun Rong 氏（Rutgers University）
題目：The Semi-rigidity of Manifolds with Non-positive Curvature
【概要】
A graph structure on a $3$-manifold $M$ consists of several disjoint embeddedtori $\{T^2_i\}$ such that each connected component of $M-\bigcup_iT^2_i$ admits a circle fibration (Seifert) fibration. We will discuss certain rigidity phenomena on the class of compact $n$-manifolds with non-positive sectional curvature which admit generalized graph structures. This is an on-going program joint with Jianguo Cao and Jeff Cheeger.
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