Last Updated:2025/12/05
The Yoneda functor sends each object X in a category C to the representable hom functor Hom_C(-, X) and sends each morphism to the natural transformation uniquely induced by that morphism according to the Yoneda lemma.
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The Yoneda functor sends each object X in a category C to the representable hom functor Hom_C(-, X) and sends each morphism to the natural transformation uniquely induced by that morphism according to the Yoneda lemma.
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ヨネダ関手は、与えられた圏 C の任意の対象 X を表現可能なホム関手 Hom_C(-, X) に対応させ、任意の射をヨネダ補題によってその射から一意に誘導される自然変換(自然同型)に対応させる関手である。