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ex/puzzle.thy
author clasohm
Wed, 02 Nov 1994 11:50:09 +0100
changeset 156 fd1be45b64bf
parent 0 7949f97df77a
permissions -rw-r--r--
added IOA to isabelle/HOL

(*  Title: 	HOL/ex/puzzle.thy
    ID:         $Id$
    Author: 	Tobias Nipkow
    Copyright   1993 TU Muenchen

An question from "Bundeswettbewerb Mathematik"
*)

Puzzle = Nat +
consts f :: "nat => nat"
rules  f_ax "f(f(n)) < f(Suc(n))"
end
Old_HOL