src/FOL/FOL.thy
author lcp
Fri, 13 Jan 1995 02:02:00 +0100
changeset 863 67692db44c70
parent 0 a5a9c433f639
child 4093 5e8f3d57dee7
permissions -rw-r--r--
empty_def typo

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