author | lcp |
Tue, 25 Apr 1995 11:14:03 +0200 | |
changeset 1072 | 0140ff702b23 |
parent 923 | ff1574a81019 |
child 1370 | 7361ac9b024d |
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