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In category theory, compact closed categories are a general context for treating dual objects. The idea of a dual object generalizes the more familiar concept of the dual of a finite-dimensional vector space. So, the motivating example of a compact closed category is FdVect, the category with finite-dimensional vector spaces as objects and linear maps as morphisms. == Symmetric compact closed category == A symmetric monoidal category is compact closed if every object has a dual object. If this holds, the dual object is unique up to canonical isomorphism, and it is denoted . In a bit more detail, an object is called the dual of A if it is equipped with two morphisms called the unit and the counit , satisfying the equations : and : where are the introduction of the unit on the left and right, respectively. For clarity, we rewrite the above compositions diagramatically. In order for to be compact closed, we need the following composites to equal : : and : : 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Compact closed category」の詳細全文を読む スポンサード リンク
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