Effective computations for weakly optimal subvarieties

Gal Binyamini, Christopher Daw

Research output: Contribution to journalArticlepeer-review

Abstract

Ren and the second author established that the weakly optimal subvarieties (e.g. maximal weakly special subvarieties) of a subvariety V of a Shimura variety arise in finitely many families. In this article, we refine this theorem by (1) constructing a finite collection of algebraic families whose fibers are precisely the weakly optimal subvarieties of V; (2) obtaining effective degree bounds on the weakly optimal locus and its individual members; (3) describing an effective procedure to determine the weakly optimal locus.
Original languageEnglish
Number of pages32
JournalJournal of the European Mathematical Society
DOIs
StatePublished - 9 Jan 2024

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