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ex/puzzle.thy
author lcp
Thu, 13 Oct 1994 09:39:15 +0100
changeset 153 c0ff8f1ebc16
parent 0 7949f97df77a
permissions -rw-r--r--
HOL/HOL.ML/selectI2: new rule for descriptions

(*  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