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math.GR2003
The Dehn Function of PSL(2,Z[1/p])
Jennifer Taback
We show that PSL(2,Z[1/p]) admits a combing with bounded asynchronous width, and use this combing to show that PSL(2,Z[1/p]) has an exponential Dehn function. As a corollary, PSL(2…
math.GT2003
The large scale geometry of some metabelian groups
J. Taback, K. Whyte
We study the large scale geometry of the upper triangular subgroup of PSL(2,Z[1/n]), which arises naturally in a geometric context. We prove a quasi-isometry classification theorem…