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arXiv:2012.13368 [math.GR]AbstractReferencesReviewsResources

The first $\ell^2$-Betti number and groups acting on trees

Indira Chatterji, Sam Hughes, Peter Kropholler

Published 2020-12-24Version 1

We generalise results of Thomas, Allcock, Thom-Petersen, and Kar-Niblo to the first $\ell^2$-Betti number of quotients of certain groups acting on trees by subgroups with free actions on the edge sets of the graphs.

Comments: 6 pages
Categories: math.GR
Subjects: 20J05, 20E08, 20F05
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