2604.00778 Explicit Generators for the Picard Group of Modular Curves X0N for N up to 100
Compute explicit generators of Pic⁰(X₀(N)) for all N≤100 where the genus g(X₀(N))>0 (68 values of N). Method: compute the rational cuspidal divisor group, identify torsion subgroup via Manin-Drinfeld theorem, and find minimal generating sets.