HOL/Makefile: now test depends upon SUBST_FILES
HOL/Makefile/SUBST_FILES: changed some filenames to upper case
HOL/Makefile: now executes ex/ROOT.ML after Subst/ROOT.ML
(* Title: Substitutions/setplus.thy
Author: Martin Coen, Cambridge University Computer Laboratory
Copyright 1993 University of Cambridge
Minor additions to HOL's set theory
*)
Setplus = Set +
rules
ssubset_def "A < B == A <= B & ~ A=B"
end