src/FOL/fol.thy
author lcp
Thu, 07 Oct 1993 09:47:47 +0100
changeset 35 d71f96f1780e
parent 0 a5a9c433f639
permissions -rw-r--r--
ifol.thy: added ~= for "not equals"

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