Subspace arrangements, BNS invariants, and pure symmetric outer automorphisms of right-angled Artin groups

Autor:	Day, Matthew B., Wade, Richard D.
Rok vydání:	2015
Předmět:	Mathematics - Group Theory 20E36 20F36 (Primary) 20J05 (Secondary)
Druh dokumentu:	Working Paper
Popis:	We introduce a homology theory for subspace arrangements, and use it to extract a new system of numerical invariants from the Bieri-Neumann-Strebel invariant of a group. We use these to characterize when the set of basis conjugating outer automorphisms (a.k.a. the pure symmetric outer automorphism group) of a right-angled Artin group is itself a right-angled Artin group. Comment: 26 pages. Minor revisions. To appear in GGD
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1508.00622 Zobrazit plný text záznamu View this record from Arxiv