Hi Jack
> Cheers for the great reply. So by deleting these I guess you make the
> vector package operational? (I can't load it anyway Go so I have to use
> vect).
(%i1) load("vector_test.mac")$
(%i2) declare([u,v],nonscalar)$
(%i3) declare(phi,scalar)$
(%i4) grad(phi*v);
(%o4) [0, 0, 0]
OOP!
(%i5) depends([u,v],[x,y,z])$
(%i6) grad(phi*v);
dv dv dv
(%o6) [PHI --, PHI --, PHI --]
dx dy dz
Attached file: vector_test.mac