English
Given left and right whisker isomorphisms, there is a canonical isomorphism F ≅ G.
Русский
Даны изоморфизмы слева и справа, существует каноническое изоморфизм F ≅ G.
LaTeX
$$natIsoOfWhiskerLeftInlInr η₁ η₂ : F ≅ G$$
Lean4
/-- A consequence of `functorEquiv`: we can construct a natural isomorphism of functors
`A ⊕ A' ⥤ B` from the data of natural isomorphisms of their whiskering with `inl_` and `inr_`. -/
@[simps]
def natIsoOfWhiskerLeftInlInr {F G : A ⊕ A' ⥤ B} (η₁ : Sum.inl_ A A' ⋙ F ≅ Sum.inl_ A A' ⋙ G)
(η₂ : Sum.inr_ A A' ⋙ F ≅ Sum.inr_ A A' ⋙ G) : F ≅ G
where
hom := natTransOfWhiskerLeftInlInr η₁.hom η₂.hom
inv := natTransOfWhiskerLeftInlInr η₁.inv η₂.inv