Presented By: Group, Lie and Number Theory Seminar - Department of Mathematics
GLNT: Rational torsion in modular Jacobians
Preston Wake (Michigan State University)
For a prime number N, Ogg's conjecture states that the torsion in the Jacobian of the modular curve X_0(N) is generated by the cusps. Mazur proved Ogg's conjecture as one of the main theorems in his "Eisenstein ideal" paper. I'll talk about a generalization of Ogg's conjecture for squarefree N and a proof using the Eisenstein ideal. This is joint work with Ken Ribet.
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