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
On Relations between Jacobians of Certain Modular Curves
โ Scribed by Imin Chen
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 228 KB
- Volume
- 231
- Category
- Article
- ISSN
- 0021-8693
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โฆ Synopsis
We confirm a conjecture of L. Merel (H. Darmon and L. Merel, J. Reine Angew. Math. 490 (1997), 81-100) describing a certain relation between the jacobians of various quotients of X p in terms of specific correspondences. The method of proof involves reducing this conjecture to a question about certain Z GL 2 F pmodule homomorphisms, which is in turn answered by exhibiting some peculiar relations in a double coset algebra.
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