qed-.
lemma scpds_inv_abbr_abst: ∀h,g,a1,a2,G,L,V1,W2,T1,T2,l. ⦃G, L⦄ ⊢ ⓓ{a1}V1.T1 •*➡*[h, g, l] ⓛ{a2}W2.T2 →
- â\88\83â\88\83T. â¦\83G, L.â\93\93V1â¦\84 â\8a¢ T1 â\80¢*â\9e¡*[h, g, l] T & â\87§[0, 1] ⓛ{a2}W2.T2 ≡ T & a1 = true.
+ â\88\83â\88\83T. â¦\83G, L.â\93\93V1â¦\84 â\8a¢ T1 â\80¢*â\9e¡*[h, g, l] T & â¬\86[0, 1] ⓛ{a2}W2.T2 ≡ T & a1 = true.
#h #g #a1 #a2 #G #L #V1 #W2 #T1 #T2 #l2 * #X #l1 #Hl21 #Hl1 #H1 #H2
lapply (da_inv_bind … Hl1) -Hl1 #Hl1
elim (lstas_inv_bind1 … H1) -H1 #U1 #HTU1 #H destruct