How to make Maxima evaluate a curl?

-----maxima-bounces at math.utexas.edu wrote: -----

>So after I take the curl, the output has the curl
>as an operator. How do  I get it to actually evaluate the curl?

Try the function 'express'

(%i1) load(vect)$
(%i2) scalefactors([[x,y,z],x,y,z])$
(%i3) A:[0,0,a*exp(-%i*beta*x)]$
(%i4) curl(A)$
(%i5) express(%o4);
(%o5) ['diff((a*%e^(-%i*beta*x)),y,1),-'diff((a*%e^(-%i*beta*x)),x,1),0]
(%i6) %,diff;
(%o6) [0,%i*a*beta*%e^(-%i*beta*x),0]

Barton