proposition: Lemma isotoid_2_1_id {B : bicat} (HB : is_univalent_2_1 B) {a b : B} (f : a --> b) : idpath f = isotoid_2_1 HB (id2_invertible_2cell f).
proof: Proof. use (invmaponpathsincl (idtoiso_2_1 _ _)). - apply isinclweq. exact (HB _ _ _ _). - rewrite idtoiso_2_1_isotoid_2_1. apply idpath. Qed.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.Bicategories.Core.Bicat UniMath.Bicategories.Core.Unitors UniMath.Bicategories.Core.Invertible_2cells UniMath.Bicategories.Morphisms.Adjunctions UniMath.Bicategories.Core.Univalence