3 papers
math.GR2002
Amenability of groups acting on trees
Laurent Bartholdi
This note describes the first example of a group that is amenable, but cannot be obtained by subgroups, quotients, extensions and direct limits from the class of groups locally of…
math.GR2002
On a group associated to
Laurent Bartholdi, Rostislav I. Grigorchuk
We construct a group acting on a binary rooted tree; this discrete group mimics the monodromy action of iterates of on associated coverings of the Riemann sphere. We t…
math.GR2001
The 2-dimension series of the just-nonsolvable BSV group
Laurent Bartholdi
I also submitted this paper as math.GR/0112109... it is therefore withdrawn from math.GR/0104076