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Mazur's Main Conjecture at Eisenstein Primes

Shimura Varieties and L-Functions March 13, 2023 - March 17, 2023

March 16, 2023 (10:30 AM PDT - 11:45 AM PDT)
Speaker(s): Giada Grossi (Université de Paris XIII (Paris-Nord))
Location: SLMath: Eisenbud Auditorium, Online/Virtual
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Abstract

Let E be an elliptic curve over the rationals and p an odd prime of good reduction. In 1972, Mazur formulated a conjecture describing points on the elliptic curve defined over the p-adic tower of cyclotomic extensions of Q in terms of a p-adic L-function. I will report on a joint work with F.Castella and C.Skinner, where we prove the conjecture in cases where E admits a rational p-isogeny. Our proof is based on a congruence argument exploiting the cyclotomic Euler system of Beilinson-Flach classes, combined with a strengthening of our previous results on the anticyclotomic Iwasawa theory of E over an imaginary quadratic field. If time permits I will also discuss about how this refined anticyclotomic result yields new cases of Kolyvagin's conjecture on indivisibility of Heegner points.

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