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An explicit non-elementary matrix over a bivariate Laurent polynomial ring

Ionin, Vasiliy et al.
arXiv (All) · Papers
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commutative-algebragroup-theoryk-theory-and-homology
Let $F$ be the fraction field of a discrete valuation ring. We give an explicit matrix in $\mathrm{SL}_2(F[X^{\pm1},Y^{\pm1}])\setminus \mathrm{E}_2(F[X^{\pm1},Y^{\pm1}])$. The proof of non-elementarity is based on techniques developed by Peter Abramenko in his preprint arXiv:0808.1095v1.
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