This framework does problems in algebraic set theory and is loaded via the
command (consult "~/SEQUEL/FRAMEWORKS/set-theory.fr").  Try the following
problem:-

(1+) (prooftool)

1> ok

CONCLUSION

?- (= (union a (union b c)) (union (union a b) c))

	There are more problems in the problems file in this directory.
Try 

(type-)
(stats+)
(autoprove ns-atp "~/SEQUEL/FRAMEWORKS/SET-THEORY/problems")
