-| da_ldef: â\88\80G,L,K,V,i,l. â\87©[0, i] L ≡ K.ⓓV → da h g G K V l → da h g G L (#i) l
-| da_ldec: â\88\80G,L,K,W,i,l. â\87©[0, i] L ≡ K.ⓛW → da h g G K W l → da h g G L (#i) (l+1)
+| da_ldef: â\88\80G,L,K,V,i,l. â¬\87[i] L ≡ K.ⓓV → da h g G K V l → da h g G L (#i) l
+| da_ldec: â\88\80G,L,K,W,i,l. â¬\87[i] L ≡ K.ⓛW → da h g G K W l → da h g G L (#i) (l+1)