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A geometric proof that SL_2(Z[t,t^-1]) is not finitely presented

Kai-Uwe Bux, Kevin Wortman

Published 2004-12-05, updated 2009-04-08Version 3

We give a new proof of the theorem of Krstic-McCool from the title. Our proof has potential applications to the study of finiteness properties of other subgroups of SL_2 resulting from rings of functions on curves.

Comments: This is the version published by Algebraic & Geometric Topology on 11 July 2006
Journal: Algebr. Geom. Topol. 6 (2006) 839-852
Categories: math.GR
Subjects: 20F05, 20F65
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