On the Prym variety of genus 3 covers of genus 1 curves

On the Prym variety of genus 3 covers of genus 1 curves
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DOI:
10.46298/epiga.2018.volume2.3663
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发表时间:
2016-12
期刊:
arXiv: Algebraic Geometry
影响因子:
--
通讯作者:
C. Ritzenthaler;M. Romagny
C. Ritzenthaler;M. Romagny
中科院分区:
其他
文献类型:
--
作者:
C. Ritzenthaler;M. Romagny

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给定亏格为1的曲线D在特征不等于2的域k上被非超椭圆亏格为3的曲线C的一般2次覆盖,我们得到一条显式亏格为2的曲线X,使得Jac(C)与Jac(D)和Jac(X)的乘积是同构的.这个构造可以看作是Nils Bruin的一个结果的退化情况。
Given a generic degree-2 cover of a genus 1 curve D by a non hyperelliptic genus 3 curve C over a field k of characteristic different from 2, we produce an explicit genus 2 curve X such that Jac(C) is isogenous to the product of Jac(D) and Jac(X). This construction can be seen as a degenerate case of a result by Nils Bruin.