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arXiv math/0007033math.CTmath.QA
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相干、同伦与2-理论

Coherence, Homotopy and 2-Theories

Noson S. Yanofsky

摘要:

2-理论是描述具有额外结构的范畴的规范方法。2-理论态射用于讨论一个结构如何被另一个结构替换。这是范畴连贯理论的核心。我们在2-理论和2-理论态射的范畴上放置一个Quillen模型范畴结构,其中弱等价是2-理论的双等价。2-理论的双等价(Morita等价)诱导2-代数范畴的双等价,并被2-代数范畴的双等价诱导。这个模型范畴结构允许我们讨论2-理论的同伦和相干性的泛性质。

英文摘要:

2-Theories are a canonical way of describing categories with extra structure. 2-theory-morphisms are used when discussing how one structure can be replaced with another structure. This is central to categorical coherence theory. We place a Quillen model category structure on the category of 2-theories and 2-theory-morphisms where the weak equivalences are biequivalences of 2-theories. A biequivalence of 2-theories (Morita equivalence) induces and is induced by a biequivalence of 2-categories of algebras. This model category structure allows one to talk of the homotopy of 2-theories and discuss the universal properties of coherence.

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