K Klosin, M Papikian - Proceedings of the American Mathematical Society, 2020 - ams.org
Let $ N= pq $ be a product of two distinct primes. There is an isogeny $ J_0 (N)^\mathrm
{new}\to J^ N $ defined over $\mathbf {Q} $ between the new quotient $ J_0 (N) $ and the …