[Maxima-discuss] texput, \frac, and diff

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

Hi list,

In this message

  https://sourceforge.net/p/maxima/mailman/message/37875807/

Leo Butler showed a texput that makes tex1 use \frac instead of \over.
But I just noticed that when I use "display2d:'emaxima$" his texput
makes d/dx be displayed as 1/x... and I don't know how to debug that.
Help, please?

Here is the code:

  load("/home/edrx/bigsrc/maxima/interfaces/emacs/emaxima/emaxima.lisp")$
  display2d:'emaxima$
  a/b;
  'diff(y,x);
  texput("/", lambda([r],
      block([n,d],
            n:num(r),
            d:denom(r),
            printf(false,"\\frac{~a}{~a}",tex1(n),tex1(d)))))$
  a/b;
  'diff(y,x);

When I run it in a REPL I get this:

  (%i1)
load("/home/edrx/bigsrc/maxima/interfaces/emacs/emaxima/emaxima.lisp")$

  (%i2) display2d:'emaxima$

  (%i3) a/b;
  (%o3) {{a}\over{b}}
  (%i4) 'diff(y,x);
  (%o4) {{d}\over{d\,x}}\,y
  (%i5) texput("/", lambda([r],
      block([n,d],
            n:num(r),
            d:denom(r),
            printf(false,"\\frac{~a}{~a}",tex1(n),tex1(d)))))$

  (%i6) a/b;
  (%o6) \frac{a}{b}
  (%i7) 'diff(y,x);
  (%o7) \frac{1}{x}\,y
  (%i8)

Thanks in advance!
  Eduardo Ochs