Ambient space of modular forms over a ring other than QQ.
Compute q-expansions for a basis of self to precision prec.
String representation for self.
Return the cuspidal subspace of this space.
EXAMPLE:
sage: C = CuspForms(7, 4, base_ring=CyclotomicField(5)) # indirect doctest
sage: type(C)
<class 'sage.modular.modform.cuspidal_submodule.CuspidalSubmodule_R'>