Trifunctors obtained by composition of bifunctors #
Given two bifunctors F₁₂ : C₁ ⥤ C₂ ⥤ C₁₂ and G : C₁₂ ⥤ C₃ ⥤ C₄, we define
the trifunctor bifunctorComp₁₂ F₁₂ G : C₁ ⥤ C₂ ⥤ C₃ ⥤ C₄ which sends three
objects X₁ : C₁, X₂ : C₂ and X₃ : C₃ to G.obj ((F₁₂.obj X₁).obj X₂)).obj X₃.
Similarly, given two bifunctors F : C₁ ⥤ C₂₃ ⥤ C₄ and G₂₃ : C₂ ⥤ C₃ ⥤ C₂₃, we define
the trifunctor bifunctorComp₂₃ F G₂₃ : C₁ ⥤ C₂ ⥤ C₃ ⥤ C₄ which sends three
objects X₁ : C₁, X₂ : C₂ and X₃ : C₃ to (F.obj X₁).obj ((G₂₃.obj X₂).obj X₃).
Auxiliary definition for bifunctorComp₁₂.
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Given two bifunctors F₁₂ : C₁ ⥤ C₂ ⥤ C₁₂ and G : C₁₂ ⥤ C₃ ⥤ C₄, this is
the trifunctor C₁ ⥤ C₂ ⥤ C₃ ⥤ C₄ obtained by composition.
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Auxiliary definition for bifunctorComp₁₂Functor.
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Auxiliary definition for bifunctorComp₁₂Functor.
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The functor (C₁ ⥤ C₂ ⥤ C₁₂) ⥤ (C₁₂ ⥤ C₃ ⥤ C₄) ⥤ C₁ ⥤ C₂ ⥤ C₃ ⥤ C₄ which
sends F₁₂ : C₁ ⥤ C₂ ⥤ C₁₂ and G : C₁₂ ⥤ C₃ ⥤ C₄ to the functor
bifunctorComp₁₂ F₁₂ G : C₁ ⥤ C₂ ⥤ C₃ ⥤ C₄.
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Auxiliary definition for bifunctorComp₂₃.
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Given two bifunctors F : C₁ ⥤ C₂₃ ⥤ C₄ and G₂₃ : C₂ ⥤ C₃ ⥤ C₄, this is
the trifunctor C₁ ⥤ C₂ ⥤ C₃ ⥤ C₄ obtained by composition.
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Auxiliary definition for bifunctorComp₂₃Functor.
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Auxiliary definition for bifunctorComp₂₃Functor.
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The functor (C₁ ⥤ C₂₃ ⥤ C₄) ⥤ (C₂ ⥤ C₃ ⥤ C₂₃) ⥤ C₁ ⥤ C₂ ⥤ C₃ ⥤ C₄ which
sends F : C₁ ⥤ C₂₃ ⥤ C₄ and G₂₃ : C₂ ⥤ C₃ ⥤ C₂₃ to the
functor bifunctorComp₂₃ F G₂₃ : C₁ ⥤ C₂ ⥤ C₃ ⥤ C₄.
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