Function: mfcuspwidth
Section: modular_forms
C-Name: mfcuspwidth
Prototype: lGG
Help: mfcuspwidth(N, cusp): width of cusp in Gamma_0(N), N being either an
 integer or a modular form space.
Doc: width of \kbd{cusp} in $\Gamma_0(N)$, $N$ being either an integer or a
 modular form space.
 \bprog
 ? mfcusps(12)
 %1 = [0, 1/2, 1/3, 1/4, 1/6, 1/12]
 ? [mfcuspwidth(12,c) | c <- mfcusps(12)]
 %2 = [12, 3, 4, 3, 1, 1]
 ? mfcuspwidth(12, oo)
 %3 = 1
 @eprog

