(* Basic properties *********************************************************)
-lemma id_isid: ð\9d\90\88â¦\83ð\9d\90\88ð\9d\90\9dâ¦\84.
+lemma id_isid: ð\9d\90\88â\9dªð\9d\90\88ð\9d\90\9dâ\9d«.
/3 width=5 by eq_push_isid/ qed.
(* Alternative definition of isid *******************************************)
-lemma eq_id_isid: â\88\80f. ð\9d\90\88ð\9d\90\9d â\89¡ f â\86\92 ð\9d\90\88â¦\83fâ¦\84.
+lemma eq_id_isid: â\88\80f. ð\9d\90\88ð\9d\90\9d â\89¡ f â\86\92 ð\9d\90\88â\9dªfâ\9d«.
/2 width=3 by isid_eq_repl_back/ qed.
-lemma eq_id_inv_isid: â\88\80f. ð\9d\90\88â¦\83fâ¦\84 → 𝐈𝐝 ≡ f.
+lemma eq_id_inv_isid: â\88\80f. ð\9d\90\88â\9dªfâ\9d« → 𝐈𝐝 ≡ f.
/2 width=1 by isid_inv_eq_repl/ qed-.