category-theory-presentation/categories/30_How/100_Functors/130_Category_of_Functors.html
2013-02-28 16:49:12 +01:00

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<h2 id="category-of-functors">Category of Functors</h2>
<p>If \(\C\) is <em>small</em> (\(\hom{\C}\) is a set). All functors from \(\C\) to some category \(\D\) form the category \(\mathrm{Func}(\C,\D)\).</p>
<ul>
<li>\(\ob{\mathrm{Func}(\C,\D)}\): Functors \(F:\C→\D\)</li>
<li>\(\hom{\mathrm{Func}(\C,\D)}\): <em>natural transformations</em></li>
<li>∘: Functor composition</li>
</ul>
<p>\(\mathrm{Func}(\C,\C)\) is the category of endofunctors of \(\C\).</p>