fact: Definition conservative_1cell_reflect_iso {B : bicat} {a b : B} {f : a --> b} (Hf : conservative_1cell f) {x : B} {g₁ g₂ : x --> a} (α : g₁ ==> g₂) (Hα : is_invertible_2cell (α ▹ f)) : is_invertible_2cell α := Hf x g₁ g₂ α Hα.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.Isos UniMath.Bicategories.Core.Bicat UniMath.Bicategories.Core.Invertible_2cells UniMath.Bicategories.Morphisms.FullyFaithful