Models for quotients of modular curves
Number Theory
2021-07-13 v2
Abstract
We describe an algorithm for computing a -rational model for the quotient of a modular curve by an automorphism group, under mild assumptions on the curve and the automorphisms, by determining -expansions for a basis of the corresponding space of cusp forms. We also give a moduli interpretation for general morphisms between modular curves.
Cite
@article{arxiv.2101.03797,
title = {Models for quotients of modular curves},
author = {Josha Box},
journal= {arXiv preprint arXiv:2101.03797},
year = {2021}
}