Parametrizing ${\rm SL}_2({\Bbb Z})$ and a question of Skolem

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Umberto Zannier Acta Arithmetica 110 (2003), 331-337 MSC: 11D04, 11D09, 11G99. DOI: 10.4064/aa110-4-2

Umberto ZannierIst. Univ. Arch. Venezia – D.C.A.
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