On Ribet’s isogeny for $J_0(65)$
Author(s) -
Krzysztof Klosin,
Mihran Papikian
Publication year - 2017
Publication title -
proceedings of the american mathematical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.968
H-Index - 84
eISSN - 1088-6826
pISSN - 0002-9939
DOI - 10.1090/proc/14019
Subject(s) - isogeny , mathematics , kernel (algebra) , quaternion algebra , discriminant , order (exchange) , quaternion , pure mathematics , hecke algebra , divisor (algebraic geometry) , algebra over a field , conjecture , combinatorics , elliptic curve , division algebra , filtered algebra , geometry , computer science , finance , artificial intelligence , economics
Let $J^{65}$ be the Jacobian of the Shimura curve attached to the indefinite quaternion algebra over $\mathbb{Q}$ of discriminant $65$. We study the isogenies $J_0(65)\rightarrow J^{65}$ defined over $\mathbb{Q}$, whose existence was proved by Ribet. We prove that there is an isogeny whose kernel is supported on the Eisenstein maximal ideals of the Hecke algebra acting on $J_0(65)$, and moreover the odd part of the kernel is generated by a cuspidal divisor of order $7$, as is predicted by a conjecture of Ogg.
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