RESIDUAL p PROPERTIES OF MAPPING CLASS GROUPS AND SURFACE GROUPS
RESIDUAL p PROPERTIES OF MAPPING CLASS GROUPS AND SURFACE GROUPS
复制标题
映射类组和表面组的剩余 p 属性
DOI:
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发表时间:
2007
期刊:
影响因子:
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通讯作者:
L. Paris
中科院分区:
文献类型:
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作者:
L. Paris
Let M(Σ, P) be the mapping class group of a punctured oriented surface (E, P) (where P may be empty), and let T p (Σ, P) be the kernel of the action of M(Σ,P) on H 1 (Σ P,F p ). We prove that T p (Σ,P) is residually p. In particular, this shows that M(Σ,P) is virtually residually p. For a group G we denote by Ip(G) the kernel of the natural action of Out(G) on H 1 (G,F p ). In order to achieve our theorem, we prove that, under certain conditions (G is conjugacy p-separable and has Property A), the group Ip(G) is residually p. The fact that free groups and surface groups have Property A is due to Grossman. The fact that free groups are conjugacy p-separable is due to Lyndon and Schupp. The fact that surface groups are conjugacy p-separable is, from a technical point of view, the main result of the paper.