src/FOL/fol.thy
author wenzelm
Fri, 10 Oct 1997 15:52:12 +0200
changeset 3835 9a5a4e123859
parent 0 a5a9c433f639
permissions -rw-r--r--
fixed dots;

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