diff -r 3d5b2b874e14 -r a73f8a7784bd ex/sorting.ML
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ex/sorting.ML	Wed Feb 23 10:05:35 1994 +0100
@@ -0,0 +1,26 @@
+(*  Title: 	HOL/ex/sorting.ML
+    ID:         $Id$
+    Author: 	Tobias Nipkow
+    Copyright   1994 TU Muenchen
+
+Some general lemmas
+*)
+
+val sorting_ss = list_ss addsimps
+      [Sorting.mset_Nil,Sorting.mset_Cons,
+       Sorting.sorted_Nil,Sorting.sorted_Cons,
+       Sorting.sorted1_Nil,Sorting.sorted1_One,Sorting.sorted1_Cons];
+
+goal Sorting.thy "!x.mset(xs@ys,x) = mset(xs,x)+mset(ys,x)";
+by(list_ind_tac "xs" 1);
+by(ALLGOALS(asm_simp_tac (sorting_ss setloop (split_tac [expand_if]))));
+val mset_app_distr = result();
+
+goal Sorting.thy "!x. mset([x:xs. ~p(x)], x) + mset([x:xs.p(x)], x) = \
+\                     mset(xs, x)";
+by(list_ind_tac "xs" 1);
+by(ALLGOALS(asm_simp_tac (sorting_ss setloop (split_tac [expand_if]))));
+val mset_compl_add = result();
+
+val sorting_ss = sorting_ss addsimps
+      [mset_app_distr, mset_compl_add];