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1 (* Title: ZF/Induct/Acc.thy |
1 (* Title: ZF/Induct/Acc.thy |
2 Author: Lawrence C Paulson, Cambridge University Computer Laboratory |
2 Author: Lawrence C Paulson, Cambridge University Computer Laboratory |
3 Copyright 1994 University of Cambridge |
3 Copyright 1994 University of Cambridge |
4 *) |
4 *) |
5 |
5 |
6 header {* The accessible part of a relation *} |
6 section {* The accessible part of a relation *} |
7 |
7 |
8 theory Acc imports Main begin |
8 theory Acc imports Main begin |
9 |
9 |
10 text {* |
10 text {* |
11 Inductive definition of @{text "acc(r)"}; see @{cite "paulin-tlca"}. |
11 Inductive definition of @{text "acc(r)"}; see @{cite "paulin-tlca"}. |