diff options
author | herbelin <herbelin@85f007b7-540e-0410-9357-904b9bb8a0f7> | 2006-03-05 21:57:47 +0000 |
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committer | herbelin <herbelin@85f007b7-540e-0410-9357-904b9bb8a0f7> | 2006-03-05 21:57:47 +0000 |
commit | 41b6404a15dafcf700addd0ce85ddd70cedb0219 (patch) | |
tree | 2cc4945d5eefa6afee5b49cdfb2c4356f4d81202 /theories/Logic/Classical_Prop.v | |
parent | 14644b3968658a30dffd6aa5d45f2765b5e6e72f (diff) |
Modularisation des preuves concernant la logique classique, l'indiscernabilité des preuves et l'axiome K
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@8136 85f007b7-540e-0410-9357-904b9bb8a0f7
Diffstat (limited to 'theories/Logic/Classical_Prop.v')
-rwxr-xr-x | theories/Logic/Classical_Prop.v | 44 |
1 files changed, 29 insertions, 15 deletions
diff --git a/theories/Logic/Classical_Prop.v b/theories/Logic/Classical_Prop.v index 1df6a354b..d714b3bf7 100755 --- a/theories/Logic/Classical_Prop.v +++ b/theories/Logic/Classical_Prop.v @@ -10,7 +10,7 @@ (** Classical Propositional Logic *) -Require Import ProofIrrelevance. +Require Import ClassicalFacts. Hint Unfold not: core. @@ -29,8 +29,8 @@ intro; apply H; intro; absurd P; trivial. Qed. Lemma not_imply_elim2 : forall P Q:Prop, ~ (P -> Q) -> ~ Q. -Proof. -intros; elim (classic Q); auto. +Proof. (* Intuitionistic *) +tauto. Qed. Lemma imply_to_or : forall P Q:Prop, (P -> Q) -> ~ P \/ Q. @@ -46,9 +46,8 @@ apply not_imply_elim2 with P; trivial. Qed. Lemma or_to_imply : forall P Q:Prop, ~ P \/ Q -> P -> Q. -Proof. -simple induction 1; auto. -intros H1 H2; elim (H1 H2). +Proof. (* Intuitionistic *) +tauto. Qed. Lemma not_and_or : forall P Q:Prop, ~ (P /\ Q) -> ~ P \/ ~ Q. @@ -62,23 +61,23 @@ simple induction 1; red in |- *; simple induction 2; auto. Qed. Lemma not_or_and : forall P Q:Prop, ~ (P \/ Q) -> ~ P /\ ~ Q. -Proof. -intros; elim (classic P); auto. +Proof. (* Intuitionistic *) +tauto. Qed. Lemma and_not_or : forall P Q:Prop, ~ P /\ ~ Q -> ~ (P \/ Q). -Proof. -simple induction 1; red in |- *; simple induction 3; trivial. +Proof. (* Intuitionistic *) +tauto. Qed. Lemma imply_and_or : forall P Q:Prop, (P -> Q) -> P \/ Q -> Q. -Proof. -simple induction 2; trivial. +Proof. (* Intuitionistic *) +tauto. Qed. Lemma imply_and_or2 : forall P Q R:Prop, (P -> Q) -> P \/ R -> Q \/ R. -Proof. -simple induction 2; auto. +Proof. (* Intuitionistic *) +tauto. Qed. Lemma proof_irrelevance : forall (P:Prop) (p1 p2:P), p1 = p2. @@ -93,4 +92,19 @@ end. Ltac classical_left := match goal with | _:_ |- _ \/?X1 => (elim (classic X1);intro;[right;trivial|left]) -end.
\ No newline at end of file +end. + +Require Export EqdepFacts. + +Module Eq_rect_eq. + +Lemma eq_rect_eq : + forall (U:Type) (p:U) (Q:U -> Type) (x:Q p) (h:p = p), x = eq_rect p Q x p h. +Proof. +intros; rewrite proof_irrelevance with (p1:=h) (p2:=refl_equal p); reflexivity. +Qed. + +End Eq_rect_eq. + +Module EqdepTheory := EqdepTheory(Eq_rect_eq). +Export EqdepTheory. |