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Article
The Dehn Function of PSL2(Z[1/p])
We show that PSL2(Z[1/p]) admits a combing with bounded asynchronous width, and use this combing to show that PSL2(Z[1/p]) has an exponential Dehn function. As a corollary, PSL2(Z[1/p]) has solvable word problem ...
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Article
Free limits of Thompson’s group F
We produce a sequence of markings S k of Thompson’s group F within the space ...
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Article
A new proof of the growth rate of the solvable Baumslag–Solitar groups
We exhibit a regular language of geodesics for a large set of elements of BS(1, n) and show that the growth rate of this language is the growth rate of the group. This provides a straightforward calculation of th...