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arxiv: math/0302191 · v1 · submitted 2003-02-17 · 🧮 math.GR

The Dehn Function of PSL(2,Z[1/p])

classification 🧮 math.GR
keywords combingdehnfunctionadmitsasynchronousautomaticboundedcorollary
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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,Z[1/p]) has solvable word problem and is not an automatic group.

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