-lemma lsubv_drops_trans_isuni (a) (h) (G):
- ∀L1,L2. G ⊢ L1 ⫃![a,h] L2 →
- ∀b,f,K2. 𝐔⦃f⦄ → ⬇*[b,f] L2 ≘ K2 →
- ∃∃K1. G ⊢ K1 ⫃![a,h] K2 & ⬇*[b,f] L1 ≘ K1.
-#a #h #G #L1 #L2 #H elim H -L1 -L2
+lemma lsubv_drops_trans_isuni (h) (a) (G):
+ ∀L1,L2. G ⊢ L1 ⫃![h,a] L2 →
+ ∀b,f,K2. 𝐔❪f❫ → ⇩*[b,f] L2 ≘ K2 →
+ ∃∃K1. G ⊢ K1 ⫃![h,a] K2 & ⇩*[b,f] L1 ≘ K1.
+#h #a #G #L1 #L2 #H elim H -L1 -L2