- comparative table of the core objects started ...

[helm.git] / matita / matita / contribs / lambdadelta / basic_2 / syntax / aarity.ma

diff --git a/matita/matita/contribs/lambdadelta/basic_2/syntax/aarity.ma b/matita/matita/contribs/lambdadelta/basic_2/syntax/aarity.ma
index 7f44246c7bde31c709c73a12f6e770df1d76c5a6..165410d41ba8eb1ad365f49b633bed9c355a7151 100644 (file)
--- a/matita/matita/contribs/lambdadelta/basic_2/syntax/aarity.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/syntax/aarity.ma
@@ -46,7 +46,8 @@ lemma discr_apair_xy_x: ∀A,B. ②B.A = B → ⊥.
 ]
 qed-.
 
-lemma discr_tpair_xy_y: ∀B,A. ②B. A = A → ⊥.
+(* Basic_2A1: was: discr_tpair_xy_y *)
+lemma discr_apair_xy_y: ∀B,A. ②B. A = A → ⊥.
 #B #A elim A -A
 [ #H destruct
 | #Y #X #_ #IHX #H elim (destruct_apair_apair_aux … H) -H /2 width=1 by/ (**) (* destruct lemma needed *)