A presentation for Hilden’s subgroup of the braid group

A presentation for Hilden’s subgroup of the braid group
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希尔登辫子小组的演示

DOI:
10.4310/mrl.2008.v15.n6.a16
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发表时间:
2007
影响因子:
1
通讯作者:
Stephen Tawn
Stephen Tawn
中科院分区:
数学3区
文献类型:
--
作者:
Stephen Tawn

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考虑单位球,$B = D \times [0,1]$,包含$n$不打结弧$a_1,\ldots,a_n$使得每个$a_i$的边界位于$D \times \{0\}$。本文给出了$B$的映射类群的有限表示,其中$a_1,\ldots,a_n\}$按集固定,$D \times \{1\}$按点固定.这个表示是用这个基团在一个简单连接的复合物上的作用来计算的。
Consider the unit ball, $B = D \times [0,1]$, containing $n$ unknotted arcs $a_1, \ldots, a_n$ such that the boundary of each $a_i$ lies in $D \times \{0\}$. We give a finite presentation for the mapping class group of $B$ fixing the arcs $\{a_1, \ldots, a_n\}$ setwise and fixing $D \times \{1\}$ pointwise. This presentation is calculated using the action of this group on a simply-connected complex.