diff options
| author |  Benjamin Barenblat <bbaren@debian.org> | 2019-02-02 19:29:23 -0500 |
|---|---|---|
| committer | Benjamin Barenblat <bbaren@debian.org> | 2019-02-02 19:29:23 -0500 |
| commit | 9ebf44d84754adc5b64fcf612c6816c02c80462d (patch) | |
| tree | bf5e06a28488e0e06a2f2011ff0d110e2e02f8fc /theories/Logic/Berardi.v | |
| parent | 9043add656177eeac1491a73d2f3ab92bec0013c (diff) | |
Imported Upstream version 8.9.0upstream/8.9.0upstream
Diffstat (limited to 'theories/Logic/Berardi.v')
| -rw-r--r-- | theories/Logic/Berardi.v | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/theories/Logic/Berardi.v b/theories/Logic/Berardi.v index c6836a1c..ed4d69ab 100644 --- a/theories/Logic/Berardi.v +++ b/theories/Logic/Berardi.v @@ -82,7 +82,7 @@ End Retracts. (** This lemma is basically a commutation of implication and existential quantification: (EX x | A -> P(x)) <=> (A -> EX x | P(x)) which is provable in classical logic ( => is already provable in - intuitionnistic logic). *) + intuitionistic logic). *) Lemma L1 : forall A B:Prop, retract_cond (pow A) (pow B). Proof. @@ -136,7 +136,7 @@ trivial. Qed. -Theorem classical_proof_irrelevence : T = F. +Theorem classical_proof_irrelevance : T = F. Proof. generalize not_has_fixpoint. unfold Not_b. @@ -148,4 +148,7 @@ intros not_true is_true. elim not_true; trivial. Qed. + +Notation classical_proof_irrelevence := classical_proof_irrelevance (compat "8.8"). + End Berardis_paradox. |