Re: [Maxima-discuss] One less bug in dim-%antideriv

[Eduardo O. <edu...@gm...>]

Done:
https://sourceforge.net/p/maxima/bugs/4639/
Thanks for the encouragement!
  Eduardo =)


On Sat, 29 Nov 2025 at 21:54, Robert Dodier <rob...@gm...> wrote:

> Hi Eduardo, thanks for your continued interest in Maxima, and thanks
> for looking into the display stuff.
>
> I've taken the liberty of forwarding your message to the mailing list.
> I think every non-personal message should be sent to the mailing list,
> on the theory that none of us own the code but we are all jointly
> responsible in some way for it.
>
> I have some other stuff that I am working on at the moment, although I
> think I will have some time in December to look into various issues.
> Can you please open a ticket on the SF bug tracker and attach your
> notes and images so that we can keep track of the problem and the
> state of its resolution.
>
> If you have a proposed bugfix, please attach it as a diff to the bug
> report.
>
> Thanks for your help, I appreciate it a lot.
>
> All the best,
>
> Robert
>
> On Sat, Nov 29, 2025 at 4:28 PM Eduardo Ochs <edu...@gm...>
> wrote:
> >
> > Hi Robert,
> >
> > many months ago you sent this "defun dim-%antideriv" to the mailing
> > list...
> >
> >   https://sourceforge.net/p/maxima/mailman/message/59178281/
> >
> > Look at the two screenshots below. The screenshot in
> > "without-setq-width.png" uses your original code - and by defining
> > this
> >
> >   mybox(o) := [box(o)];
> >
> > and then displaying "antideriv"s inside "mybox"es we can see clearly
> > that there is something wrong with the widths... and the screenshot in
> > "with-setq-width.png" uses your "dim-%antideriv" with a setq that I
> > added - this one:
> >
> >   ;; Edrx:
> >   (setq width (+ expr-w 1 (max upper-w lower-w)))
> >
> > Apparently that line fixes the bug in some cases... note that o1, o2
> > and o4 look fine, but there is a one-off error in the display of o3.
> >
> > If you think that you won't have time to play with that in the next
> > months AND you have suggestions on which of the less-obvious special
> > variables could be the culprits, please say, and I will try to
> > understand them when I have time. Besides that, many thanks - your
> > "dim-%antideriv" is much more readable than the old-style dim-*
> > functions in displa.lisp! - and sorry for taking months to debug it,
> > etc... =)
> >
> >   Cheers!
> >     Eduardo Ochs
> >     https://anggtwu.net/eev-maxima.html
> >
> >
> > P.S.: my version of the code is here:
> > <https://anggtwu.net/MAXIMA/dim-antideriv.lisp.html>
> >
>