1Function: mfbd 2Section: modular_forms 3C-Name: mfbd 4Prototype: GL 5Help: mfbd(F,d): F being a generalized modular form, return B(d)(F), where 6 B(d) is the expanding operator tau -> d tau. 7Doc: $F$ being a generalized modular form, return $B(d)(F)$, where $B(d)$ is 8 the expanding operator $\tau\mapsto d\tau$. 9 \bprog 10 ? D2=mfbd(mfDelta(),2); mfcoefs(D2, 6) 11 %1 = [0, 0, 1, 0, -24, 0, 252] 12 @eprog 13