Optimal quotients of Jacobians with toric reduction and component groups

Mihran Papikian, Joseph Rabinoff

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Let J be a Jacobian variety with toric reduction over a local field K. Let J → E be an optimal quotient defined over K, where E is an elliptic curve. We give examples in which the functorially induced map φJ → φE on component groups of the Neron models is not surjective. This answers a question of Ribet and Takahashi. We also give various criteria under which φJ → φE E is surjective and discuss when these criteria hold for the Jacobians of modular curves.

Original languageEnglish (US)
Pages (from-to)1362-1381
Number of pages20
JournalCanadian Journal of Mathematics
Issue number6
StatePublished - Dec 2016

All Science Journal Classification (ASJC) codes

  • General Mathematics


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