Today I Learned

Some of the things I've learned every day since Oct 10, 2016

79: Hom-Set

In category theory, the hom-set between 2 objects X, Y in a category C, often denoted as

\textrm{hom}_C (X, Y)

or simply

\textrm{hom} (X, Y)

is the collection of arrows (morphisms) in C from X to Y. Note that despite the name, the hom-set is not a set in general.

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