On Sun, 29 Nov 2009, Tiscali wrote:
< I'm working in the sets theory... What i have to do if I want everytime there is a {} (empty set) in a result maxima shows a symbol (or a letter)? Example:
<
< {{},{{}}}
<
< I want maxima showing this:
<
< {ES,{ES}}
<
< (ES for Empty Set...but it's okay anyway..)
Try:
(%i2) tellsimpafter({},ES);
(%o2) [setrule2,?simp\-set]
(%i3) {};
(%o3) ES
(%i4) {{},{{}}};
(%o4) {ES,{ES}}
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