src/FOL/fol.thy
author wenzelm
Mon, 16 Nov 1998 10:41:08 +0100
changeset 5869 b279a84ac11c
parent 0 a5a9c433f639
permissions -rw-r--r--
added read;

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