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Diffstat (limited to 'theories/ZArith/Zmin.v')
| -rw-r--r-- | theories/ZArith/Zmin.v | 107 |
1 files changed, 37 insertions, 70 deletions
diff --git a/theories/ZArith/Zmin.v b/theories/ZArith/Zmin.v index 7b9ad469..30b88d8f 100644 --- a/theories/ZArith/Zmin.v +++ b/theories/ZArith/Zmin.v @@ -1,90 +1,57 @@ (************************************************************************) (* v * The Coq Proof Assistant / The Coq Development Team *) -(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2011 *) +(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2012 *) (* \VV/ **************************************************************) (* // * This file is distributed under the terms of the *) (* * GNU Lesser General Public License Version 2.1 *) (************************************************************************) -(*i $Id: Zmin.v 14641 2011-11-06 11:59:10Z herbelin $ i*) -(** THIS FILE IS DEPRECATED. Use [Zminmax] instead. *) +(** THIS FILE IS DEPRECATED. *) -Require Import BinInt Zorder Zminmax. +Require Import BinInt Zcompare Zorder. -Open Local Scope Z_scope. +Local Open Scope Z_scope. -(** [Zmin] is now [Zminmax.Zmin]. Code that do things like - [unfold Zmin.Zmin] will have to be adapted, and neither - a [Definition] or a [Notation] here can help much. *) +(** Definition [Z.min] is now [BinInt.Z.min]. *) +(** Exact compatibility *) -(** * Characterization of the minimum on binary integer numbers *) +Notation Zmin_case := Z.min_case (compat "8.3"). +Notation Zmin_case_strong := Z.min_case_strong (compat "8.3"). +Notation Zle_min_l := Z.le_min_l (compat "8.3"). +Notation Zle_min_r := Z.le_min_r (compat "8.3"). +Notation Zmin_glb := Z.min_glb (compat "8.3"). +Notation Zmin_glb_lt := Z.min_glb_lt (compat "8.3"). +Notation Zle_min_compat_r := Z.min_le_compat_r (compat "8.3"). +Notation Zle_min_compat_l := Z.min_le_compat_l (compat "8.3"). +Notation Zmin_idempotent := Z.min_id (compat "8.3"). +Notation Zmin_n_n := Z.min_id (compat "8.3"). +Notation Zmin_comm := Z.min_comm (compat "8.3"). +Notation Zmin_assoc := Z.min_assoc (compat "8.3"). +Notation Zmin_irreducible_inf := Z.min_dec (compat "8.3"). +Notation Zsucc_min_distr := Z.succ_min_distr (compat "8.3"). +Notation Zmin_SS := Z.succ_min_distr (compat "8.3"). +Notation Zplus_min_distr_r := Z.add_min_distr_r (compat "8.3"). +Notation Zmin_plus := Z.add_min_distr_r (compat "8.3"). +Notation Zpos_min := Pos2Z.inj_min (compat "8.3"). -Definition Zmin_case := Z.min_case. -Definition Zmin_case_strong := Z.min_case_strong. +(** Slightly different lemmas *) -Lemma Zmin_spec : forall x y, - x <= y /\ Zmin x y = x \/ x > y /\ Zmin x y = y. +Lemma Zmin_spec x y : + x <= y /\ Z.min x y = x \/ x > y /\ Z.min x y = y. Proof. - intros x y. rewrite Zgt_iff_lt, Z.min_comm. destruct (Z.min_spec y x); auto. + Z.swap_greater. rewrite Z.min_comm. destruct (Z.min_spec y x); auto. Qed. -(** * Greatest lower bound properties of min *) - -Definition Zle_min_l : forall n m, Zmin n m <= n := Z.le_min_l. -Definition Zle_min_r : forall n m, Zmin n m <= m := Z.le_min_r. - -Definition Zmin_glb : forall n m p, p <= n -> p <= m -> p <= Zmin n m - := Z.min_glb. -Definition Zmin_glb_lt : forall n m p, p < n -> p < m -> p < Zmin n m - := Z.min_glb_lt. - -(** * Compatibility with order *) - -Definition Zle_min_compat_r : forall n m p, n <= m -> Zmin n p <= Zmin m p - := Z.min_le_compat_r. -Definition Zle_min_compat_l : forall n m p, n <= m -> Zmin p n <= Zmin p m - := Z.min_le_compat_l. - -(** * Semi-lattice properties of min *) - -Definition Zmin_idempotent : forall n, Zmin n n = n := Z.min_id. -Notation Zmin_n_n := Zmin_idempotent (only parsing). -Definition Zmin_comm : forall n m, Zmin n m = Zmin m n := Z.min_comm. -Definition Zmin_assoc : forall n m p, Zmin n (Zmin m p) = Zmin (Zmin n m) p - := Z.min_assoc. - -(** * Additional properties of min *) - -Lemma Zmin_irreducible_inf : forall n m, {Zmin n m = n} + {Zmin n m = m}. -Proof. exact Z.min_dec. Qed. - -Lemma Zmin_irreducible : forall n m, Zmin n m = n \/ Zmin n m = m. -Proof. intros; destruct (Z.min_dec n m); auto. Qed. - -Notation Zmin_or := Zmin_irreducible (only parsing). - -Lemma Zmin_le_prime_inf : forall n m p, Zmin n m <= p -> {n <= p} + {m <= p}. -Proof. intros n m p; apply Zmin_case; auto. Qed. - -(** * Operations preserving min *) - -Definition Zsucc_min_distr : - forall n m, Zsucc (Zmin n m) = Zmin (Zsucc n) (Zsucc m) - := Z.succ_min_distr. - -Notation Zmin_SS := Z.succ_min_distr (only parsing). - -Definition Zplus_min_distr_r : - forall n m p, Zmin (n + p) (m + p) = Zmin n m + p - := Z.plus_min_distr_r. - -Notation Zmin_plus := Z.plus_min_distr_r (only parsing). - -(** * Minimum and Zpos *) - -Definition Zpos_min : forall p q, Zpos (Pmin p q) = Zmin (Zpos p) (Zpos q) - := Z.pos_min. +Lemma Zmin_irreducible n m : Z.min n m = n \/ Z.min n m = m. +Proof. destruct (Z.min_dec n m); auto. Qed. +Notation Zmin_or := Zmin_irreducible (compat "8.3"). +Lemma Zmin_le_prime_inf n m p : Z.min n m <= p -> {n <= p} + {m <= p}. +Proof. apply Z.min_case; auto. Qed. +Lemma Zpos_min_1 p : Z.min 1 (Zpos p) = 1. +Proof. + now destruct p. +Qed. |