GLOBAL WEIERSTRASS EQUATIONS OF HYPERELLIPTIC CURVES
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en
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Ce document a été publié dans
Transactions of the American Mathematical Society. 2022
American Mathematical Society
Date de soutenance
2022Résumé en anglais
Given a hyperelliptic curve C of genus g over a number field K and a Weierstrass model {\mathsrc C} of C over the ring of integers O_K (i.e. the hyperelliptic involution of C extends to {\mathsrc C} and the quotient is a ...Lire la suite >
Given a hyperelliptic curve C of genus g over a number field K and a Weierstrass model {\mathsrc C} of C over the ring of integers O_K (i.e. the hyperelliptic involution of C extends to {\mathsrc C} and the quotient is a smooth model of P1_K over OK), we give necessary and sometimes sufficient conditions for {\mathsrc C} to be defined by a global Weierstrass equation. In particular, if C has everywhere good reduction, we prove that it is defined by a global Weierstrass equation with invertible discriminant if the class number hK is prime to 2(2g+1), confirming a conjecture of M. Sadek.< Réduire
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