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On fundamental solutions of binary quadratic form equations

Keith R. Matthews, John P. Robertson, Anitha Srinivasan (2015)

Acta Arithmetica

We show that, with suitable modification, the upper bound estimates of Stolt for the fundamental integer solutions of the Diophantine equation Au²+Buv+Cv²=N, where A>0, N≠0 and B²-4AC is positive and nonsquare, in fact characterize the fundamental solutions. As a corollary, we get a corresponding result for the equation u²-dv²=N, where d is positive and nonsquare, in which case the upper bound estimates were obtained by Nagell and Chebyshev.

On generalized Fermat equations of signature (p,p,3)

Karolina Krawciów (2011)

Colloquium Mathematicae

This paper focuses on the Diophantine equation x + p α y = M z ³ , with fixed α, p, and M. We prove that, under certain conditions on M, this equation has no non-trivial integer solutions if n ( M , p α ) , where ( M , p α ) is an effective constant. This generalizes Theorem 1.4 of the paper by Bennett, Vatsal and Yazdani [Compos. Math. 140 (2004), 1399-1416].

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