The Pure Symmetric Automorphisms of a Free Group Form a Duality Group
β Scribed by Noel Brady; Jon McCammond; John Meier; Andy Miller
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- English
- Weight
- 177 KB
- Volume
- 246
- Category
- Article
- ISSN
- 0021-8693
No coin nor oath required. For personal study only.
β¦ Synopsis
The pure symmetric automorphism group of a finitely generated free group consists of those automorphisms which send each standard generator to a conjugate of itself. We prove that these groups are duality groups.
π SIMILAR VOLUMES
We show that the representations of certain automorphism groups of a free group afforded by compact Lie groups as described by Long can be decomposed into sums of trivial representations and MagnusαGassner representations.
Let F be a finitely generated free group, and let n denote its rank. A subgroup H of F is said to be automorphism-fixed, or auto-fixed for short, if there exists a set S of automorphisms of F such that H is precisely the set of elements fixed by every element of S; similarly, H is 1-auto-fixed if th
Let F n be a free group with rank n, and denote by Out F n its outer automorphism group. For arbitrary n, consider the orders of periodic elements in Out F n or, equivalently, the orders of finite cyclic subgroups of Out F n . By considering group actions on finite connected graphs, we obtained the
Let F be a free group of rank n. Denote by Out F its outer automorphism n n group, that is, its automorphism group modulo its inner automorphism group. For arbitrary n, by considering group actions on finite connected graphs, we derived the maximum order of finite abelian subgroups in Out F . Moreov