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Klein forms and the generalized superelliptic equation

By M.A. Bennett and S.R. Dahmen


If F(x; y) 2 Z[x; y] is an irreducible binary form of degree k 3, then a theorem of Darmon and Granville implies that the generalized superelliptic equation F(x; y) = zl has, given an integer l maxf2; 7 kg, at most nitely many solutions in coprime integers x; y and z. In this paper, for large classes of forms of degree k = 3; 4; 6 and 12 (including, heuristically, \most" cubic forms), we extend this to prove a like result, where the parameter l is now taken to be variable. In the case of irreducible cubic forms, this provides the rst examples where such a conclusion has been proven. The method of proof combines classical invariant theory, modular Galois representations, and properties of elliptic curves with isomorphic mod-n Galois representations

Topics: Wiskunde en Informatica (WIIN), Mathematics, Landbouwwetenschappen, Natuurwetenschappen, Wiskunde: algemeen
Year: 2013
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