src/FOL/fol.thy
author paulson
Fri, 18 Feb 2000 15:35:29 +0100
changeset 8255 38f96394c099
parent 0 a5a9c433f639
permissions -rw-r--r--
new distributive laws

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