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ex/puzzle.thy
author nipkow
Tue, 22 Mar 1994 08:25:30 +0100
changeset 54 5ea12dfd9393
parent 0 7949f97df77a
permissions -rw-r--r--
used ordered rewriting to simplify some proofs
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(*  Title: 	HOL/ex/puzzle.thy
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    ID:         $Id$
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    Author: 	Tobias Nipkow
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    Copyright   1993 TU Muenchen
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An question from "Bundeswettbewerb Mathematik"













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*)













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Puzzle = Nat +













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consts f :: "nat => nat"













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rules  f_ax "f(f(n)) < f(Suc(n))"













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end















Old_HOL