| author | clasohm |
| Wed, 02 Nov 1994 11:50:09 +0100 | |
| changeset 156 | fd1be45b64bf |
| parent 128 | 89669c58e506 |
| permissions | -rw-r--r-- |
| 128 | 1 |
(* Title: HOL/Finite.thy |
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ID: $Id$ |
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Author: Lawrence C Paulson, Cambridge University Computer Laboratory |
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Copyright 1994 University of Cambridge |
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Finite powerset operator |
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*) |
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Finite = Lfp + |
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consts Fin :: "'a set => 'a set set" |
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inductive "Fin(A)" |
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intrs |
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emptyI "{} : Fin(A)"
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insertI "[| a: A; b: Fin(A) |] ==> insert(a,b) : Fin(A)" |
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end |