(* Basic_2A1: includes: lift_inj *)
lemma lifts_inj: ∀T1,U,f. ⬆*[f] T1 ≡ U → ∀T2. ⬆*[f] T2 ≡ U → T1 = T2.
-#T1 #U #f #H1 #T2 #H2 lapply (isid_after_dx 𝐈𝐝 f ?)
+#T1 #U #f #H1 #T2 #H2 lapply (isid_after_dx 𝐈𝐝 … f)
/3 width=6 by lifts_div, lifts_fwd_isid/
qed-.
(* Basic_2A1: includes: lift_mono *)
lemma lifts_mono: ∀T,U1,f. ⬆*[f] T ≡ U1 → ∀U2. ⬆*[f] T ≡ U2 → U1 = U2.
-#T #U1 #f #H1 #U2 #H2 lapply (isid_after_sn 𝐈𝐝 f ?)
+#T #U1 #f #H1 #U2 #H2 lapply (isid_after_sn 𝐈𝐝 … f)
/3 width=6 by lifts_conf, lifts_fwd_isid/
qed-.