src/FOL/fol.thy
author wenzelm
Mon, 20 Oct 1997 10:38:16 +0200
changeset 3931 c3c287d3f502
parent 0 a5a9c433f639
permissions -rw-r--r--
local section; improved global, local;

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