From: Claudio Sacerdoti Coen <claudio.sacerdoticoen@unibo.it>
Date: Tue, 16 Mar 2010 14:17:51 +0000 (+0000)
Subject: ...
X-Git-Tag: make_still_working~3009
X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=commitdiff_plain;h=2371237a27b5fa23f741e381073a48d84bc6a906;p=helm.git

...
---

diff --git a/helm/software/matita/nlibrary/Plogic/connectives.ma b/helm/software/matita/nlibrary/Plogic/connectives.ma
index 84bd36454..491657676 100644
--- a/helm/software/matita/nlibrary/Plogic/connectives.ma
+++ b/helm/software/matita/nlibrary/Plogic/connectives.ma
@@ -30,8 +30,6 @@ ndefinition Not: Prop → Prop ≝
 ninductive Not (A:Prop): Prop ≝
 nmk: (A → False) → Not A.
 
-ncheck Not_ind.
-
 interpretation "logical not" 'not x = (Not x).
 
 ntheorem absurd : ∀ A:Prop. A → ¬A → False.