initial properies of the "same top term constructor" predicate

[helm.git] / matita / matita / contribs / lambda_delta / Basic_2 / computation / csn.ma

diff --git a/matita/matita/contribs/lambda_delta/Basic_2/computation/csn.ma b/matita/matita/contribs/lambda_delta/Basic_2/computation/csn.ma
index f5d8b739017588a8c6ea96faaf7562b9551ac55f..043fa9a277e25087e892c2805158f7b480052a7d 100644 (file)
--- a/matita/matita/contribs/lambda_delta/Basic_2/computation/csn.ma
+++ b/matita/matita/contribs/lambda_delta/Basic_2/computation/csn.ma
@@ -62,7 +62,7 @@ lemma csn_cast: ∀L,W. L ⊢ ⬇* W → ∀T. L ⊢ ⬇* T → L ⊢ ⬇* ⓣW.
 @csn_intro #X #H1 #H2
 elim (cpr_inv_cast1 … H1) -H1
 [ * #W0 #T0 #HLW0 #HLT0 #H destruct
-  elim (eq_false_inv_tpair … H2) -H2
+  elim (eq_false_inv_tpair_sn … H2) -H2
   [ /3 width=3/
   | -HLW0 * #H destruct /3 width=1/ 
   ]