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adjunction

/æˈdʒʌŋkʃən/

Meanings

noun

付加, 添加

Examples :

新しい遊び場を既存の公園に付加したことで、家族にとってずっと魅力的な場所になりました。
noun

随伴

Given a pair of categories \mathcal{C} and \mathcal{D}: an anti-parallel pair of functors F:\mathcal{C}\rightarrow \mathcal{D} and G:\mathcal{D}\rightarrow \mathcal{C} and a natural transformation \eta:\mbox{id}C \rightarrow GF called “unit” such that for any object A \in \mathcal{C}, for any object B \in \mathcal{D}, and for any morphism f:A\rightarrow GB, there is a unique morphism g:FA\rightarrow B such that Gg \circ \etaA = f. (Note: there is another natural transformation called “counit” as well but its existence may be derived by theorem.) The pair of functors express a similarity between the pair of categories which is weaker than that of an equivalence of categories.

Examples :

教授は、群論と線形代数の例を用いて、2つの数学的構造間の随伴の概念を説明し、それらがどのように正式なつながりを確立するかを示しました。