Re: [Maxima-discuss] a(b), a[b], op, args

[Barton W. <wi...@un...>]

Try using subvarp​; for example

(%i3) subvarp(a[b]);
(%o3) true

(%i4) subvarp(a(b));
(%o4) false


The user documentation:

Function: subvarp (expr)

Returns true if
expr
 is a subscripted variable, for example a[i].

--Barton
________________________________
From: Eduardo Ochs <edu...@gm...>
Sent: Friday, July 12, 2024 02:12
To: <max...@li...> <max...@li...>
Subject: [Maxima-discuss] a(b), a[b], op, args

Caution: Non-NU Email

Hi list,

"op" and "args" don't distinguish between a(b) and a[b]:

  (%i1) [o:a(b),op(o),args(o)];
  (%o1)                           [a(b), a, [b]]
  (%i2) [o:a[b],op(o),args(o)];
  (%o2)                            [a , a, [b]]
                                     b
  (%i3)

what do I need to use to distinguish them?

Why I'm asking: there are several kinds of expressions that this
program - <http://anggtwu.net/eev-maxima.html#luatree> - doesn't
handle well... I'm trying to fix it.

  Thanks in advance!
    Eduardo =)