July 2021 Uniformity in Mordell–Lang for curves
Vesselin Dimitrov, Ziyang Gao, Philipp Habegger
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Ann. of Math. (2) 194(1): 237-298 (July 2021). DOI: 10.4007/annals.2021.194.1.4

Abstract

Consider a smooth, geometrically irreducible, projective curve of genus $g\ge 2$ defined over a number field of degree $d \ge 1$. It has at most finitely many rational points by the Mordell Conjecture, a theorem of Faltings. We show that the number of rational points is bounded only in terms of $g$, $d$ and the Mordell–Weil rank of the curve's Jacobian, thereby answering in the affirmative a question of Mazur. In addition we obtain uniform bounds, in $g$ and $d$, for the number of geometric torsion points of the Jacobian which lie in the image of an Abel–Jacobi map. Both estimates generalize our previous work for one-parameter families. Our proof uses Vojta's approach to the Mordell Conjecture, and the key new ingredient is the generalization of a height inequality due to the second- and third-named authors.

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Vesselin Dimitrov. Ziyang Gao. Philipp Habegger. "Uniformity in Mordell–Lang for curves." Ann. of Math. (2) 194 (1) 237 - 298, July 2021. https://doi.org/10.4007/annals.2021.194.1.4

Information

Published: July 2021
First available in Project Euclid: 21 December 2021

Digital Object Identifier: 10.4007/annals.2021.194.1.4

Subjects:
Primary: 11G30 , 11G50 , 14G05 , 14G25

Keywords: height inequality , Mordell-Lang , rational points , uniformity

Rights: Copyright © 2021 Department of Mathematics, Princeton University

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Vol.194 • No. 1 • July 2021
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