[Maxima] Empty Set Symbol

[Stavros Macrakis]

On Sun, Nov 29, 2009 at 6:13 AM, Leo Butler <l.butler at ed.ac.uk> wrote:

> (%i2) tellsimpafter({},ES);

This is a bad idea -- set operations and simplifications will not work
with ES.  Better to have a custom print function, e.g.

      printset(s):=print(subst('ES,{},s))$

        -s