HOL/ROOT/HOL_dup_cs: removed as obsolete
HOL/ROOT: now passes "classical" to Classical_Fun
HOL/ROOT: no longer proves rev_cut_eq for hyp_subst_tac
(* Title: HOL/equalities
ID: $Id$
Author: Lawrence C Paulson, Cambridge University Computer Laboratory
Copyright 1994 University of Cambridge
Equalities involving union, intersection, inclusion, etc.
*)
equalities = subset