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

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

2004-12-05

arxiv.org/abs/math/0412101v3

Algebr. Geom. Topol. 6 (2006) 839-852

Mathematics

Group Theory

This is the version published by Algebraic & Geometric Topology on 11 July 2006

Scientific paper

10.2140/agt.2006.6.839

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.

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