proposition: Lemma iso_inv_iso_inv {C : precategory} (a b : ob C) (f : iso a b) : iso_inv_from_iso (iso_inv_from_iso f) = f.
proof: Proof. apply eq_iso. simpl. apply pathsinv0. apply inv_iso_unique'. apply iso_after_iso_inv. Defined.
imports: UniMath.Foundations.PartA UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.MoreFoundations.Tactics UniMath.CategoryTheory.Core.Categories