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Lax natural transformation : ウィキペディア英語版
Lax natural transformation
In the mathematical field of category theory, specifically the theory of 2-categories, a lax natural transformation is a kind of morphism between 2-functors.
==Definition==
Let ''C'' and ''D'' be 2-categories, and let F,G\colon C\to D be 2-functors. A lax natural transformation \alpha\colon F\to G between them consists of
* a morphism \alpha_c\colon F(c)\to G(c) in ''D'' for every object c\in C and
* a 2-morphism \alpha_f\colon G(f)\circ\alpha_c \to \alpha_\circ F(f) for every morphism f\colon c\to c' in ''C''
satisfying some equations (see 〔nLab page (http://ncatlab.org/nlab/show/lax+natural+transformation)〕 or 〔Gray, Adjointness For 2-Categories〕)

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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