2 papers
math.GT2008
Commensurators of cusped hyperbolic manifolds
Oliver Goodman, Damian Heard, Craig Hodgson
This paper describes a general algorithm for finding the commensurator of a non-arithmetic cusped hyperbolic manifold, and for deciding when two such manifolds are commensurable. T…
math.GR2007
On a generalization of Dehn's algorithm
Oliver Goodman, Michael Shapiro
Viewing Dehn's algorithm as a rewriting system, we generalise to allow an alphabet containing letters which do not necessarily represent group elements. This extends the class of g…