Hi folks, I'm running Maple 17.02 and getting very different behaviors from subs and isolate. My actual expressions are way more complicated but this simple example illustrates the problem:
restart; with(PDEtools); F := diff_table(f(x, y, w, z, a, b));
subs(F[x] = Z(x, y, w, z, a, b), F[x]+F[x, b]-10);
subs(F[x] = Z(x, y, w, z, a, b), F[x]+F[x, y]-10);
The last line gives me what I want Z+Z[y]-10 but the second line gives me Z+F[x,b]-10. That is, if I use b instead of y as variable, subs ignores the second derivative...
Can any one replicate this behavior? Is it a bug? Thanks for any help.