Let C be a curve of genus 2 and Ο 1 : C -β E 1 a map of degree n, from C to an elliptic curve E 1 , both curves defined over C. This map induces a degree n map Ο 1 : P 1 -β P 1 which we call a Frey-Kani covering. We determine all possible ramifications for Ο 1 . If Ο 1 : C -β E 1 is maximal then the
Jacobians of Genus One Curves
β Scribed by Sang Yook An; Seog Young Kim; David C. Marshall; Susan H. Marshall; William G. McCallum; Alexander R. Perlis
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- English
- Weight
- 122 KB
- Volume
- 90
- Category
- Article
- ISSN
- 0022-314X
No coin nor oath required. For personal study only.
β¦ Synopsis
Consider a curve of genus one over a field K in one of three explicit forms: a double cover of P 1 , a plane cubic, or a space quartic. For each form, a certain syzygy from classical invariant theory gives the curve's jacobian in Weierstrass form and the covering map to its jacobian induced by the K-rational divisor at infinity. We give a unified account of all three cases.
2001 Academic Press
Given a curve C of genus one, there is an associated elliptic curve (E, O), where E is the jacobian of C, Jac(C), and O is the point on E corresponding to the trivial divisor class.
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