- lambdadelta: last recursive part of preservation finally proved!

[helm.git] / matita / matita / contribs / lambdadelta / basic_2 / dynamic / ypr.ma

diff --git a/matita/matita/contribs/lambdadelta/basic_2/dynamic/ypr.ma b/matita/matita/contribs/lambdadelta/basic_2/dynamic/ypr.ma
index ea20e0283a5a3433a482560d5c39c8159fc78671..065e8c83ef384a4489c75d6c24334900a630c4bc 100644 (file)
--- a/matita/matita/contribs/lambdadelta/basic_2/dynamic/ypr.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/dynamic/ypr.ma
@@ -21,7 +21,7 @@ inductive ypr (h) (g) (L1) (T1): relation2 lenv term ≝
 | ypr_fw    : ∀L2,T2. ♯{L2, T2} < ♯{L1, T1} → ypr h g L1 T1 L2 T2
 | ypr_ltpr  : ∀L2. L1 ➡ L2 → ypr h g L1 T1 L2 T1
 | ypr_cpr   : ∀T2. L1 ⊢ T1 ➡ T2 → ypr h g L1 T1 L1 T2
-| ypr_ssta  : ∀T2,l. ⦃h, L1⦄ ⊢ T1 •[g, l + 1] T2 → ypr h g L1 T1 L1 T2
+| ypr_ssta  : ∀T2,l. ⦃h, L1⦄ ⊢ T1 •[g] ⦃l+1, T2⦄ → ypr h g L1 T1 L1 T2
 | ypr_lsubsv: ∀L2. h ⊢ L2 ⊩:⊑[g] L1 → ypr h g L1 T1 L2 T1
 .