src/FOL/fol.thy
author paulson
Fri, 13 Jul 2001 18:08:26 +0200
changeset 11420 9529d31f39e0
parent 0 a5a9c433f639
permissions -rw-r--r--
added\\protect

FOL = IFOL +
rules
classical "(~P ==> P) ==> P"
end