Re: [Maxima-discuss] Why is op('diff(f, x)) equal to 'derivative?

[Stavros M. <mac...@gm...>]

Maxima distinguishes between the "noun" (declarative) and the "verb"
(imperative) form of several operators: diff, integrate, limit, .... See
the manual: https://maxima.sourceforge.io/docs/manual/maxima_30.html

op( '( diff(f(x),x) ) ) is the verb form but

op(  diff(f(x),x)  ) is the noun form.

Take a look at the documentation for nounify and verbify to convert between
the two.

In many cases (but not diff), the two forms print the same.

       -s

On Sun, Dec 11, 2022, 15:12 Eduardo Ochs <edu...@gm...> wrote:

> Thanks! That solves some of my doubts...
> But what should I use instead of funmake to make
>
>   'diff(f, x);
>
> and
>
>   funmake('diff, [f, x]);
>
> yield identical results?
> Thanks in advance!
>   E.
>
> On Sun, 11 Dec 2022 at 16:19, Richard Fateman <fa...@gm...> wrote:
> >
> > diff is an alias for the operation derivative.
> > ?print(diff(f(x),x))  shows the internal representation.
> >
> >
> > On Sun, Dec 11, 2022 at 10:53 AM Eduardo Ochs <edu...@gm...>
> wrote:
> >>
> >> Hi list,
> >>
> >> what happens exactly when we run this?
> >>
> >>   'diff(f, x);
> >>
> >> As far as I know diff(f, x) - without the ' - is equivalent to:
> >>
> >>   apply('diff, [f, x]);
> >>
> >> but
> >>
> >>   op('diff(f, x));
> >>
> >> returns "derivative", and I don't know what and where are the
> >> functions that convert 'diff to 'derivative...
> >>
> >>   Thanks in advance!
> >>     Eduardo Ochs
> >>     http://angg.twu.net/eev-maxima.html
> >>
> >>
> >> _______________________________________________
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> >> Max...@li...
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>
>
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