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arXiv 2410.09488math.AGmath.NT
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可分解 Jacobian 的显式构造

Explicit construction of decomposable Jacobians

Mesut Buğday, Mohammad Sadek

AI总结:

本文给出了特征0域上可分解超椭圆 Jacobian 簇的显式构造,并应用于构造具有无穷多二次扭转且含有有理非 Weierstrass 点的超椭圆曲线族。

摘要:

在本文中,我们给出了特征 $0$ 域上可分解超椭圆 Jacobian 簇的显式构造。这些包括同构于两个绝对简单超椭圆 Jacobian 簇乘积、一个超椭圆 Jacobian 簇的平方,以及四个超椭圆 Jacobian 簇乘积(其中三个具有相同维数)的超椭圆 Jacobian 簇。作为应用,我们构造了这样的超椭圆曲线族:它们有无穷多个二次扭转,每个扭转至少有两个有理非 Weierstrass 点;我们还构造了超椭圆曲线四元组族,连同无穷多个无平方因子 $d$,使得每条曲线关于 $d$ 的二次扭转都至少有一个有理非 Weierstrass 点。

英文摘要:

In this note we give explicit constructions of decomposable hyperelliptic Jacobian varieties over fields of characteristic $0$. These include hyperelliptic Jacobian varieties that are isogenous to a product of two absolutely simple hyperelliptic Jacobian varieties, a square of a hyperelliptic Jacobian variety, and a product of four hyperelliptic Jacobian varieties three of which are of the same dimension. As an application, we produce families of hyperelliptic curves with infinitely many quadratic twists having at least two rational non-Weierstrass points; and families of quadruples of hyperelliptic curves together with infinitely many square-free $d$ such that the quadratic twists of each of the curves by $d$ possess at least one rational non-Weierstrass point.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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