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On the mapping class group of a genus 2 handlebody

机译:在属2手柄体的映射类组上

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摘要

A complex of incompressible surfaces in a handlebody is constructed so that it contains, as a subcomplex, the complex of curves of the boundary of the handlebody. For genus 2 handlebodies, the group of automorphisms of this complex is used to characterize the mapping class group of the handlebody. In particular, it is shown that all automorphisms of the complex of incompressible surfaces are geometric, that is, induced by a homeomorphism of the handlebody.
机译:构造了手柄主体中不可压缩表面的复合体,以使其包含作为子复合体的手柄体边界曲线的复合体。对于属2手柄体,此复合体的自同构组用于表征手柄体的映射类组。特别地,示出了不可压缩表面的复合体的所有自同构是几何的,即,由手柄体的同胚引起的。

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