Geodesic
A geometric proof that SL2(ℤ[t,t−1]) is not finitely presented
Bux, Kai-Uwe1 ; Wortman, Kevin2
1Department of Mathematics, University of Virginia, PO Box 400137, Charlottesville VA 22094-4137, USA
2Mathematics Department, Yale University, PO Box 208283, New Haven CT 06520-8283, USA
Algebraic and Geometric Topology, Tome 6 (2006) no. 2, pp. 839-852
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We give a new proof of the theorem of Krstić–McCool from the title. Our proof has potential applications to the study of finiteness properties of other subgroups of SL2 resulting from rings of functions on curves.

DOI : 10.2140/agt.2006.6.839
Keywords: finiteness properties, trees, geometric group theory

Bux, Kai-Uwe  1   ; Wortman, Kevin  2

1 Department of Mathematics, University of Virginia, PO Box 400137, Charlottesville VA 22094-4137, USA
2 Mathematics Department, Yale University, PO Box 208283, New Haven CT 06520-8283, USA 
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Bux, Kai-Uwe; Wortman, Kevin. A geometric proof that SL2(ℤ[t,t−1]) is not finitely presented. Algebraic and Geometric Topology, Tome 6 (2006) no. 2, pp. 839-852. doi: 10.2140/agt.2006.6.839

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