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most citedThe Number of Pseudo-Anosov Elements in the Mapping Class Group of a Four-Holed Sphere

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math.GT2009

Outer Automorphisms of Mapping Class Groups of Nonorientable Surfaces

Ferihe Atalan

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 eith…