Theorems · Definition · category theory

CategoryTheory.Bicategory.leftUnitorNatIso

{B : Type u} →
  [inst : CategoryTheory.Bicategory B] →
    (a b : B) →
      (CategoryTheory.Bicategory.precomposing a a b).obj (CategoryTheory.CategoryStruct.id a) ≅
        CategoryTheory.Functor.id (a ⟶ b)

Left unitor as a natural isomorphism.

Defined in

Mathlib.CategoryTheory.Bicategory.Basic

Cited by

2 results in Mathlib

Foundations

Depth 24 from the axioms · uses propext, Classical.choice, Quot.sound

Assumes

CategoryTheory.Bicategory