Surface Houghton groups

Abstract

For every $n\ge 2$, the {\em surface Houghton group} ${\mathcal{B}}_n$ is defined as the asymptotically rigid mapping class group of a surface with exactly $n$ ends, all of them non-planar. The groups ${\mathcal{B}}_n$ are analogous to, and in fact contain, the braided Houghton groups. These groups also arise naturally in topology: every monodromy homeomorphisms of a fibered component of a depth-1 foliation of closed 3-manifold is conjugate into some ${\mathcal{B}}_n$. As countable mapping class groups of infinite type surfaces, the groups ${\mathcal{B}}_n$ lie somewhere between classical mapping class groups and big mapping class groups. We initiate the study of surface Houghton groups proving, among other things, that ${\mathcal{B}}_n$ is of type $F_{n-1}$, but not of type $F{P}_n$, analogous to the braided Houghton groups.

19 pages, 1 figure