additions and corrections for the article on λδ-2B

[helm.git] / matita / matita / contribs / lambdadelta / static_2 / static / req_drops.ma

diff --git a/matita/matita/contribs/lambdadelta/static_2/static/req_drops.ma b/matita/matita/contribs/lambdadelta/static_2/static/req_drops.ma
index 0eae38683e849dccd1b7b4f17c61e072f43a55bd..76f25cd40ee8ee92b8fa7d0bfdd959a66f12e2f7 100644 (file)
--- a/matita/matita/contribs/lambdadelta/static_2/static/req_drops.ma
+++ b/matita/matita/contribs/lambdadelta/static_2/static/req_drops.ma
@@ -21,6 +21,6 @@ include "static_2/static/req.ma".
 
 (* Basic_2A1: uses: lleq_inv_lift_le lleq_inv_lift_be lleq_inv_lift_ge *)
 lemma req_inv_lifts_bi: ∀L1,L2,U. L1 ≡[U] L2 → ∀b,f. 𝐔⦃f⦄ →
-                        ∀K1,K2. ⬇*[b, f] L1 ≘ K1 → ⬇*[b, f] L2 ≘ K2 →
+                        ∀K1,K2. ⬇*[b,f] L1 ≘ K1 → ⬇*[b,f] L2 ≘ K2 →
                         ∀T. ⬆*[f] T ≘ U → K1 ≡[T] K2.
 /2 width=10 by rex_inv_lifts_bi/ qed-.