(* Contribution to the Coq Library   V6.3 (July 1999)                    *)
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(*                 The Calculus of Inductive Constructions                  *)
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(*                                Projet Coq                                *)
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(*                     INRIA                        ENS-CNRS                *)
(*              Rocquencourt                        Lyon                    *)
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(*                                Coq V5.10                                 *)
(*                              Nov 25th 1994                               *)
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(*                            Nat_complements.v                             *)
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Lemma eq_gt_O_dec : forall n : nat, {n = 0} + {n > 0}.
simple destruct n; auto with arith.