X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Fnlibrary%2Flogic%2Fconnectives.ma;h=4d085995d4ea1a589af54e8552afdbe2fbf713e3;hb=1d7773584ddd6463b0941026f114b0173e3b6b72;hp=026e9216951c9224737b6493953317effd635369;hpb=1dd64d6c49db7dc0dc0ee39c30da4c7a043b8bde;p=helm.git

diff --git a/helm/software/matita/nlibrary/logic/connectives.ma b/helm/software/matita/nlibrary/logic/connectives.ma
index 026e92169..4d085995d 100644
--- a/helm/software/matita/nlibrary/logic/connectives.ma
+++ b/helm/software/matita/nlibrary/logic/connectives.ma
@@ -14,33 +14,43 @@
 
 include "logic/pts.ma".
 
-ninductive True: CProp ≝
+ninductive True: CProp[0] ≝
   I : True.
 
-ninductive False: CProp ≝.
+ninductive False: CProp[0] ≝.
 
-ndefinition Not: CProp → CProp ≝
+ndefinition Not: CProp[0] → CProp[0] ≝
   λA. A → False.
 
 interpretation "logical not" 'not x = (Not x).
 
-ninductive And (A,B:CProp) : CProp ≝
+ninductive And (A,B:CProp[0]) : CProp[0] ≝
     conj : A → B → And A B.
 
 interpretation "logical and" 'and x y = (And x y).
 
-ninductive Or (A,B:CProp) : CProp ≝
+ninductive Or (A,B:CProp[0]) : CProp[0] ≝
      or_introl : A → Or A B
    | or_intror : B → Or A B.
 
 interpretation "logical or" 'or x y = (Or x y).
 
-ninductive Ex (A:Type) (P:A → CProp) : CProp ≝
+ninductive Ex (A:Type[0]) (P:A → CProp[0]) : CProp[0] ≝
     ex_intro: ∀x:A. P x → Ex A P.
 
+
+ninductive Ex1 (A:Type[1]) (P:A → CProp[0]) : CProp[1] ≝
+    ex_intro1: ∀x:A. P x → Ex1 A P.
+
+interpretation "exists1" 'exists x = (Ex1 ? x).
 interpretation "exists" 'exists x = (Ex ? x).
 
-nrecord iff (A,B: CProp) : CProp ≝
+ninductive sigma (A : Type[0]) (P : A → CProp[0]) : Type[0] ≝ 
+ sig_intro : ∀x:A.P x → sigma A P. 
+
+interpretation "sigma" 'sigma \eta.p = (sigma ? p). 
+
+nrecord iff (A,B: CProp[0]) : CProp[0] ≝
  { if: A → B;
    fi: B → A
  }.