Function: mfeigenbasis
Section: modular_forms
C-Name: mfeigenbasis
Prototype: G
Help: mfeigenbasis(mf): vector of the eigenforms for the space
 mf if split, otherwise error.
Doc: vector of the eigenforms for the space \kbd{mf} if split, otherwise error.
 The initial basis of forms computed by \kbd{mfinit} before splitting
 is also available via \kbd{mfbasis}.
 \bprog
 ? mf = mfsplit([26,2]);
 ? see(L) = for(i=1,#L,print(mfcoefs(L[i],6)));
 ? see( mfeigenbasis(mf) )
 [0, 1, -1, 1, 1, -3, -1]
 [0, 1, 1, -3, 1, -1, -3]
 ? see( mfbasis(mf) )
 [0, 2, 0, -2, 2, -4, -4]
 [0, -2, -4, 10, -2, 0, 8]
 @eprog
