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Dirichlet series and hyperelliptic curves

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Published/Copyright: September 25, 2007
Forum Mathematicum
From the journal Volume 19 Issue 4

Abstract

For a fixed hyperelliptic curve C given by the equation y2 = f(x) with f ∈ ℤ[x] having distinct roots and degree at least 5, we study the variation of rational points on the quadratic twists Cm whose equation is given by my2 = f(x). More precisely, we study the Dirichlet series where the summation is over all non-zero squarefree integers. We show that converges for ℜ(s) > 1. We extend its range of convergence assuming the ABC conjecture. This leads us to study related Dirichlet series attached to binary forms. We are then led to investigate the variation of rational points on twists of superelliptic curves. We apply this study to certain classical problems of analytic number theory such as the number of powerfree values of a fixed polynomial in ℤ[x].


(Communicated by Peter Sarnak)


Received: 2005-08-09
Published Online: 2007-09-25
Published in Print: 2007-07-01

© Walter de Gruyter

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