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A Reduction of the Batyrev-Manin Conjecture for Kummer Surfaces

Published online by Cambridge University Press:  20 November 2018

David McKinnon
David McKinnon*
Affiliation:
Department of Pure Mathematics University of Waterloo Waterloo, ON N2T 2M2, e-mail: dmckinno@math.uwaterloo.ca
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Abstract

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Let $V$ be a $K3$ surface defined over a number field $k$ . The Batyrev-Manin conjecture for $V$ states that for every nonempty open subset $U$ of $V$ , there exists a finite set ${{Z}_{U}}$ of accumulating rational curves such that the density of rational points on $U\,-\,{{Z}_{U}}$ is strictly less than the density of rational points on ${{Z}_{U}}$ . Thus, the set of rational points of $V$ conjecturally admits a stratification corresponding to the sets ${{Z}_{U}}$ for successively smaller sets $U$ .

In this paper, in the case that $V$ is a Kummer surface, we prove that the Batyrev-Manin conjecture for $V$ can be reduced to the Batyrev-Manin conjecture for $V$ modulo the endomorphisms of $V$ induced by multiplication by $m$ on the associated abelian surface $A$ . As an application, we use this to show that given some restrictions on $A$ , the set of rational points of $V$ which lie on rational curves whose preimages have geometric genus 2 admits a stratification of Batyrev-Manin type.

Keywords

11G3514G05rational pointsBatyrev-Manin conjectureKummer surfacerational curveabelian surfaceheight

Information

Type
Research Article
Information
Canadian Mathematical Bulletin , Volume 47 , Issue 3 , 01 September 2004 , pp. 398 - 406
Copyright
Copyright © Canadian Mathematical Society 2004

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