author | lcp |
Tue, 08 Nov 1994 11:21:33 +0100 | |
changeset 166 | c59c471126ab |
parent 128 | 89669c58e506 |
permissions | -rw-r--r-- |
(* Title: HOL/Finite.thy ID: $Id$ Author: Lawrence C Paulson, Cambridge University Computer Laboratory Copyright 1994 University of Cambridge Finite powerset operator *) Finite = Lfp + consts Fin :: "'a set => 'a set set" inductive "Fin(A)" intrs emptyI "{} : Fin(A)" insertI "[| a: A; b: Fin(A) |] ==> insert(a,b) : Fin(A)" end