category-theory-presentation/categories/30_How/100_Functors/130_Category_of_Functors.md

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Category of Functors
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If \\(\\C\\) is _small_ (\\(\\hom{\\C}\\) is a set).
All functors from \\(\\C\\) to some category \\(\\D\\)
form the category \\(\\mathrm{Func}(\\C,\\D)\\).
- \\(\\ob{\\mathrm{Func}(\\C,\\D)}\\): Functors \\(F:\\C→\\D\\)
- \\(\\hom{\\mathrm{Func}(\\C,\\D)}\\): _natural transformations_
- ∘: Functor composition
\\(\\mathrm{Func}(\\C,\\C)\\) is the category of endofunctors of \\(\\C\\).