A geometric proof that SL₂(Z[t,t^-1]) is not finitely presented
classification
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proofapplicationscurvesfinitelyfinitenessfunctionsgeometricgive
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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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