[Robert Dodier <robert_dodier@yahoo.com>, Fri, 22 Oct 2004 06:15:20 -0700 (PDT)]:
> > > (%i2) df(x) := ''(diff(f(x), x));
> > ...
> > > Note that df(x) := ''diff(f(x),x)$ doesn't work.
...
> Oh, sorry. The comparison is ''(diff(...)) and ''diff(...) --
> I suppose '' applies to diff instead of the output of diff
> in the second case.
Oh, sorry for the noise. Obviously, I didn't notice the parentheses.
Albert.