On Subgroups of the Pentagon Group
by Claas Röver
Keywords
graph group; surface group
Abstract
This note presents a very short algebraic proof for a new result which implies the known fact that the fundamental group of a closed orientable surface is a subgroup of a graph group.
This is published in Proc. Royal Irish Academy 107, 2007, no. 1, 11-13
Of course you can also ask me for a hard copy.