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  • ...math>. (We sometimes write <math>f:A \to B</math> to mean <math>f\in \text{Hom}(A,B)</math>.) ...ry operation <math>\circ: \text{Hom}(B,C) \times \text{Hom}(A,B) \to \text{Hom}(A,C)</math> called composition, which satisfies:
    5 KB (792 words) - 18:01, 7 April 2012
  • a [[functor]] from <math>F</math> to '''Set''', the [[category of sets]]. Let <math>h_A</math> denote the functor <math>\mathcal{C} \to \mathbf{Set}</math> that
    4 KB (698 words) - 17:21, 6 November 2017