(* Alternative definition with pr_id and pr_eq ******************************)
(*** eq_id_isid *)
-lemma pr_eq_id_isi (f): ð\9d\90¢ â\89¡ f → 𝐈❨f❩.
+lemma pr_eq_id_isi (f): ð\9d\90¢ â\89\90 f → 𝐈❨f❩.
/2 width=3 by pr_isi_eq_repl_back/ qed.
(*** eq_id_inv_isid *)
-lemma pr_isi_inv_eq_id (f): ð\9d\90\88â\9d¨fâ\9d© â\86\92 ð\9d\90¢ â\89¡ f.
+lemma pr_isi_inv_eq_id (f): ð\9d\90\88â\9d¨fâ\9d© â\86\92 ð\9d\90¢ â\89\90 f.
/2 width=1 by pr_isi_inv_eq_repl/ qed-.