From: Ferruccio Guidi <ferruccio.guidi@unibo.it>
Date: Wed, 9 Mar 2011 11:59:38 +0000 (+0000)
Subject: the interpretation for Sigma was missing
X-Git-Tag: make_still_working~2569
X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=commitdiff_plain;h=fe4df66869250943913c7fa534bb22305a320683;p=helm.git

the interpretation for Sigma was missing
---

diff --git a/matita/matita/lib/basics/types.ma b/matita/matita/lib/basics/types.ma
index c14cc60b4..08b99a8cb 100644
--- a/matita/matita/lib/basics/types.ma
+++ b/matita/matita/lib/basics/types.ma
@@ -56,4 +56,6 @@ inductive option (A:Type[0]) : Type[0] ≝
 
 (* sigma *)
 inductive Sig (A:Type[0]) (f:A→Type[0]) : Type[0] ≝
-  dp: ∀a:A.(f a)→Sig A f.
\ No newline at end of file
+  dp: ∀a:A.(f a)→Sig A f.
+  
+interpretation "Sigma" 'sigma x = (Sig ? x).