Well, the following home made definition seems to work:
cross(X,Y):=transpose([X[2]*Y[3]-X[3]*Y[2],X[3]*Y[1]-X[1]*Y[3],X[1]*Y[2]-X[2]*Y[1]]);
gives:
(C31) cross(A,B);
[ [4] ]
[ ]
(D31) [ [4] ]
[ ]
[ [- 4] ]
which is OK except that there are more brackets than necessary.
Still, there must be a built-in version!?!?
Yours,
Poul Riis