General Events - Department of Mathematics

Speaker: Sheng-Yang Kevin Ho (UC San Diego)

Title: Ogg's conjectures over function fields   

Abstract: In the early 1970s, Andrew Ogg made several conjectures about the rational torsion points of elliptic curves over ℚ and the Jacobians of modular curves. These conjectures were proved shortly after by Barry Mazur as a consequence of his fundamental study of the arithmetic properties of modular curves and Hecke algebras. In this talk, we review the function field analogues of Ogg's conjectures, their current status, and the methods that have been applied to prove some of these conjectures. The methods are based on the ideas of Mazur and Ogg, but there are interesting differences and technical complications that arise in the function field setting, as well as intriguing possible new directions for generalizations. This is joint work with Cécile Armana and Mihran Papikian.