Actually, there's one minor problem: the mixed partial derivatives are treated as different objects, so I have to do
kxy := eval(D(f(x,z),[x,z]),z=y(x)) > kyx := eval(D(f(x,z),[z,x]),z=y(x)) > > subst(f2,[kxy=F[xy],kyx=F[xy]) > which is clearly going to become prohibitive for larger numbers of variables. How can I convince Fricas that D(f(x,z),[x,z]) and D(f(x,z),[z,x]) are in fact the same? -- You received this message because you are subscribed to the Google Groups "FriCAS - computer algebra system" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/fricas-devel. For more options, visit https://groups.google.com/groups/opt_out.
