This section is about computing with modular forms, modular symbols, and modular abelian varieties. Most of the Sage functionality we describe below is new code written for Sage by myself, Craig Citro, Robert Bradshaw, and Jordi Quer in consultation with John Cremona. It has much overlap in functionality with the modular forms code in Magma, which I developed during 1998-2004.
.. toctree:: :maxdepth: 2 modular_forms_and_hecke_operators modular_symbols method_of_graphs level_one_forms half_integral generators_for_rings l_series modabvar