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Diffstat (limited to 'contrib/correctness/ProgInt.v')
| -rw-r--r-- | contrib/correctness/ProgInt.v | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/contrib/correctness/ProgInt.v b/contrib/correctness/ProgInt.v new file mode 100644 index 00000000..c26e3553 --- /dev/null +++ b/contrib/correctness/ProgInt.v @@ -0,0 +1,19 @@ +(************************************************************************) +(* v * The Coq Proof Assistant / The Coq Development Team *) +(* <O___,, * CNRS-Ecole Polytechnique-INRIA Futurs-Universite Paris Sud *) +(* \VV/ **************************************************************) +(* // * This file is distributed under the terms of the *) +(* * GNU Lesser General Public License Version 2.1 *) +(************************************************************************) + +(* Certification of Imperative Programs / Jean-Christophe Filliātre *) + +(* $Id: ProgInt.v,v 1.2.2.1 2004/07/16 19:30:00 herbelin Exp $ *) + +Require Export ZArith. +Require Export ZArith_dec. + +Theorem Znotzero : forall x:Z, {x <> 0%Z} + {x = 0%Z}. +Proof. +intro x. elim (Z_eq_dec x 0); auto. +Qed.
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