fact: Definition left_adjoint {a b : B} (f : a --> b) : UU := ∑ (αd : left_adjoint_data f), left_adjoint_axioms αd.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.Bicategories.Core.Bicat UniMath.Bicategories.Core.Invertible_2cells