src/FOL/fol.thy
author paulson
Wed, 20 Mar 1996 18:42:31 +0100
changeset 1593 69ed69a9c32a
parent 0 a5a9c433f639
permissions -rw-r--r--
New module for proof objects (deriviations)

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