src/FOL/FOL.thy
author paulson
Wed, 21 Aug 1996 13:22:23 +0200
changeset 1933 8b24773de6db
parent 0 a5a9c433f639
child 4093 5e8f3d57dee7
permissions -rw-r--r--
Addition of message NS5

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