On asymptotic dimension of groups acting on trees
Abstract
Description
We prove the following theorem: Let $π$ be the fundamental group of a finite graph of groups with finitely generated vertex groups $G_v$ having asdim $G_v\le n$ for all vertices $v$. Then asdim$π\le n+1$.
This gives the best possible estimate for the asymptotic dimension of an HNN extension and the amalgamated product.
12 pages
12 pages