Natural Transformation
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High Quality Content by WIKIPEDIA articles! In category theory, a branch of mathematics, a natural transformation provides a way of transforming one functor into another while respecting the internal structure (i.e. the composition of morphisms) of the categories involved. Hence, a natural transformation can be considered to be a "morphism of functors". Indeed this intuition can be formalized to define so-called functor categories. Natural transformations are, after categories and functors, one of the most basic notions of category theory and consequently appear in the majority of its applicat...
High Quality Content by WIKIPEDIA articles! In category theory, a branch of mathematics, a natural transformation provides a way of transforming one functor into another while respecting the internal structure (i.e. the composition of morphisms) of the categories involved. Hence, a natural transformation can be considered to be a "morphism of functors". Indeed this intuition can be formalized to define so-called functor categories. Natural transformations are, after categories and functors, one of the most basic notions of category theory and consequently appear in the majority of its applications. If F and G are functors between the categories C and D, then a natural transformation from F to G associates to every object X in C a morphism X : F(X) G(X) in D called the component of at X, such that for every morphism f : X Y in C we have: eta_Y circ F(f) = G(f) circ eta_X
