Mapping class group of a handlebody
Volume 158 / 1998
Fundamenta Mathematicae 158 (1998), 195-228
DOI: 10.4064/fm-158-3-195-228
Abstract
Let B be a 3-dimensional handlebody of genus g. Let ℳ be the group of the isotopy classes of orientation preserving homeomorphisms of B. We construct a 2-dimensional simplicial complex X, connected and simply-connected, on which ℳ acts by simplicial transformations and has only a finite number of orbits. From this action we derive an explicit finite presentation of ℳ.