update in static_2 and basic_2 for the article

[helm.git] / matita / matita / contribs / lambdadelta / basic_2 / etc / cpx_req.etc

diff --git a/matita/matita/contribs/lambdadelta/basic_2/etc/cpx_req.etc b/matita/matita/contribs/lambdadelta/basic_2/etc/cpx_req.etc
new file mode 100644 (file)
index 0000000..8b0fdeb
--- /dev/null
+++ b/matita/matita/contribs/lambdadelta/basic_2/etc/cpx_req.etc
@@ -0,0 +1,13 @@
+(* req_req is missing, with req_sym *)
+
+(* Basic_2A1: was: cpx_lleq_conf *)
+lemma cpx_req_conf (h) (G):
+      ∀L2,T1,T2. ⦃G,L2⦄ ⊢ T1 ⬈[h] T2 →
+      ∀L1. L2 ≡[T1] L1 → ⦃G,L1⦄ ⊢ T1 ⬈[h] T2.
+/3 width=3 by req_cpx_trans, req_sym/ qed-.
+
+(* Basic_2A1: was: cpx_lleq_conf_dx *)
+lemma cpx_req_conf_dx (h) (G):
+      ∀L2,T1,T2. ⦃G,L2⦄ ⊢ T1 ⬈[h] T2 →
+      ∀L1. L1 ≡[T1] L2 → L1 ≡[T2] L2.
+/4 width=6 by cpx_req_conf_sn, req_sym/ qed-.