$\SU(2)\times...\times\SU(2)$的双陪集与自由群的外自同构
Double cosets for $\SU(2)\times...\times\SU(2)$ and outer automorphisms of free groups
摘要:
考虑$\SU(2)$的$n$拷贝的乘积关于对角子群的双陪集空间。我们得到了这个空间的参数化,Haar测度的径向部分,以及自由群$F_{n-1}$和$n-1$弦的辫群的外自同构群的作用的明确公式。
英文摘要:
Consider the space of double cosets of the product of $n$ copies of $\SU(2)$ with respect to the diagonal subgroup. We get a parametrization of this space, the radial part of the Haar measure, and explicit formulas for the actions of the group of outer automorphisms of the free group $F_{n-1}$ and of the braid group of $n-1$ strings.
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