On Some Open Cases of a Conjecture of Conrad, Edixhoven and Stein

Davide De Leo, Michael Stoll

Let \( p \geq 5 \) be a prime. In 2003 Conrad, Edixhoven, and Stein conjectured that the rational torsion subgroup of the modular Jacobian \( J_1(p) \) coincides with the rational…