Outer Automorphisms of Mapping Class Groups of Nonorientable Surfaces

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Let Ng be the connected closed nonorientable surface of genus g >= 5 and Mod(Ng) denote the mapping class group of Ng. We prove that the outer automorphism group of Mod(Ng) is either trivial or Z if g is odd, and injects into the mapping class group of sphere with four holes if g is even.
21 pages,8 figures

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Geometric Topology, 57M99; 57N05

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http://salesiana.dossiersoluciones.com/handle/123456789/227883

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0904.3129
 http://arxiv.org/abs/0904.3129

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arXiv