Last Updated
：2025/11/28
counit
Noun
Japanese Meaning
随伴関手において、左随伴関手と右随伴関手の合成から右随伴の定義域の恒等関手への自然変換。数学（圏論）の概念として、余単位とも呼ばれる。
（ plural ）
Quizzes for review
(mathematics) In an adjunction, a natural transformation from the composition of the left adjoint functor with the right adjoint functor to the identity functor of the domain of the right adjoint functor.
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counit
In many adjunctions, the counit gives a canonical natural transformation from the composition of the left adjoint followed by the right adjoint to the identity functor on the right adjoint's domain.
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In many adjunctions, the counit gives a canonical natural transformation from the composition of the left adjoint followed by the right adjoint to the identity functor on the right adjoint's domain.
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