The rational cuspidal subgroup of $J_0(p^{2}M)$ with $M$ squarefree

Jia-Wei Guo, Yifan Yang, Hwajong Yoo +1

For a positive integer $N$, let ${\mathcal{C}}_N(\mathbb{Q})$ be the rational cuspidal subgroup of $J_0(N)$ and $\mathcal{C}(N)$ be the rational cuspidal divisor class group of $X_0(…