关于两个生成元上自由群的全形群的线性性
On the linearity of the holomorph group of a free group on two generators
摘要:
设F_n表示n个字母生成的自由群。本文的目的是证明两个生成元上的自由群的全形Hol(F_2)是线性的。因此,F_2的任何由线性群H的分裂群扩张都是线性的。这个结果给出了Aut(F_3)的一个大的线性子群。第二个应用是亏格为一的两个穿孔曲面的映射类群是线性的。
英文摘要:
Let F_n denote the free group generated by n letters. The purpose of this article is to show that Hol(F_2), the holomorph of the free group on two generators, is linear. Consequently, any split group extension of F_2 by a linear group H is linear. This result gives a large linear subgroup of Aut(F_3). A second application is that the mapping class group for genus one surfaces with two punctures is linear.
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