Please, check my new logic algebra package:
http://beshenov.ru/maxima/logic/logic-mac-2.1.tar.bz2
I've added new operators by the following code:
nary ("nand",62)$
nary ("nor",61)$
infix ("implies",59)$
nary ("eq",58)$
nary ("xor",58)$
Maybe it is better to eventually declare them in src/.
The simplifier is logic_simp, but I think it should be merged somehow
with the basic Maxima simplifier. (Any suggestions?)
I'll add it to share/contrib/ soon.
--
Boomtime, Chaos 7 YOLD 3175
Alexey Beshenov http://beshenov.ru/