- substitution lemma for native type assignmenr proved!

[helm.git] / matita / matita / contribs / lambda_delta / basic_2 / grammar / term_simple.ma

diff --git a/matita/matita/contribs/lambda_delta/basic_2/grammar/term_simple.ma b/matita/matita/contribs/lambda_delta/basic_2/grammar/term_simple.ma
index b51523544811b1d089a69a322df7d3ca395d36f9..f32ae0e7ec6cb3f896d8be5519ae135ae2213d29 100644 (file)
--- a/matita/matita/contribs/lambda_delta/basic_2/grammar/term_simple.ma
+++ b/matita/matita/contribs/lambda_delta/basic_2/grammar/term_simple.ma
@@ -25,14 +25,14 @@ interpretation "simple (term)" 'Simple T = (simple T).
 
 (* Basic inversion lemmas ***************************************************)
 
-fact simple_inv_bind_aux: ∀T. 𝐒[T] → ∀J,W,U. T = ⓑ{J} W. U → False.
+fact simple_inv_bind_aux: ∀T. 𝐒[T] → ∀J,W,U. T = ⓑ{J} W. U → ⊥.
 #T * -T
 [ #I #J #W #U #H destruct
 | #I #V #T #J #W #U #H destruct
 ]
 qed.
 
-lemma simple_inv_bind: ∀I,V,T. 𝐒[ⓑ{I} V. T] → False.
+lemma simple_inv_bind: ∀I,V,T. 𝐒[ⓑ{I} V. T] → ⊥.
 /2 width=6/ qed-.
 
 lemma simple_inv_pair: ∀I,V,T.  𝐒[②{I}V.T] → ∃J. I = Flat2 J.