Cusp form
= Cusp form
{wiki}
A cusp form is a modular form that vanishes at every cusp. At the cusp at infinity for the full modular group it has an expansion $\sum_{n\geq1}a_nq^n$.
= Cusp form
{wiki}
A cusp form is a modular form that vanishes at every cusp. At the cusp at infinity for the full modular group it has an expansion $\sum_{n\geq1}a_nq^n$.