| author | wenzelm |
| Tue, 17 Nov 1998 14:10:40 +0100 | |
| changeset 5911 | 7da8033264fa |
| parent 5184 | 9b8547a9496a |
| child 8415 | 852c63072334 |
| permissions | -rw-r--r-- |
| 1465 | 1 |
(* Title: HOL/ex/sorting.ML |
| 969 | 2 |
ID: $Id$ |
| 1465 | 3 |
Author: Tobias Nipkow |
| 969 | 4 |
Copyright 1994 TU Muenchen |
5 |
||
6 |
Some general lemmas |
|
7 |
*) |
|
8 |
||
| 5069 | 9 |
Goal "!x. mset (xs@ys) x = mset xs x + mset ys x"; |
| 5184 | 10 |
by (induct_tac "xs" 1); |
| 4686 | 11 |
by (ALLGOALS Asm_simp_tac); |
| 2517 | 12 |
qed "mset_append"; |
| 969 | 13 |
|
| 5069 | 14 |
Goal "!x. mset [x:xs. ~p(x)] x + mset [x:xs. p(x)] x = \ |
| 969 | 15 |
\ mset xs x"; |
| 5184 | 16 |
by (induct_tac "xs" 1); |
| 4686 | 17 |
by (ALLGOALS Asm_simp_tac); |
| 969 | 18 |
qed "mset_compl_add"; |
19 |
||
| 2517 | 20 |
Addsimps [mset_append, mset_compl_add]; |
21 |
||
| 5069 | 22 |
Goal "set xs = {x. mset xs x ~= 0}";
|
| 5184 | 23 |
by (induct_tac "xs" 1); |
| 4686 | 24 |
by (ALLGOALS Asm_simp_tac); |
| 2517 | 25 |
by (Fast_tac 1); |
|
3647
a64c8fbcd98f
Renamed theorems of the form set_of_list_XXX to set_XXX
paulson
parents:
3465
diff
changeset
|
26 |
qed "set_via_mset"; |
| 2517 | 27 |
|
28 |
(* Equivalence of two definitions of `sorted' *) |
|
29 |
||
30 |
val prems = goalw Sorting.thy [transf_def] |
|
31 |
"transf(le) ==> sorted1 le xs = sorted le xs"; |
|
| 5184 | 32 |
by (induct_tac "xs" 1); |
33 |
by (ALLGOALS(asm_simp_tac (simpset() addsplits [list.split]))); |
|
| 2517 | 34 |
by (cut_facts_tac prems 1); |
35 |
by (Fast_tac 1); |
|
36 |
qed "sorted1_is_sorted"; |