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arXiv 0912.4464math.CT
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松弛单向纤维化

Lax Monoidal Fibrations

Marek Zawadowski

摘要:

我们介绍了一个宽松的monoidal纤维化的概念,我们展示了它如何可以方便地用来处理各种代数结构,发挥了重要作用,在一些定义的opetopic集(贝兹-多兰,Hermida Makkai的权力)。我们提出了“标准”这样的结构,指数纤维化的基本纤维化和三个领域的应用。第一个领域与A的T范畴有关。布罗尼Burroni lax么半群纤维化中的么半群形成T-范畴的纤维化。在此背景下,相对Burroni纤维化和自由T-范畴的构造,使我们能够推广T. Leinster到opetopic集的范畴(如果需要,内部到任何Grothendieck topos)。我们还表明,纤维化的(1级)multicategories,认为Hermida Makkai的权力,相当于纤维化的(有限,carnival)多项式单子。这种等价性是由合并签名、多项式图和多项式(有限,内)函子的松弛monoidal纤维化的等价性引起的。最后,我们为对称签名、解析图(这里介绍的概念)和(有限、多变量)解析(内)函子开发了类似的理论。除其他事项外,我们表明,对称multicategories的纤维化是等价的分析单子的纤维化。我们也给出了这样的纤维化的解析单子的一个特征。这种纤维化的一个对象是Set的一个切片上的一个弱Carnummonad,它的函子部分是一个弱保持宽回调的有限函子。这个纤维化的态射是其函子部分是拉回函子的单子的弱carnadic态射。

英文摘要:

We introduce the notion of a lax monoidal fibration and we show how it can be conveniently used to deal with various algebraic structures that play an important role in some definitions of the opetopic sets (Baez-Dolan, Hermida-Makkai-Power). We present the 'standard' such structures, the exponential fibrations of basic fibrations and three areas of applications. First area is related to the T-categories of A. Burroni. The monoids in the Burroni lax monoidal fibrations form the fibration of T-categories. The construction of the relative Burroni fibrations and free T-categories in this context, allow us to extend the definition of the set of opetopes given by T. Leinster to the category of opetopic sets (internally to any Grothendieck topos, if needed). We also show that fibration of (1-level) multicategories, considered by Hermida-Makkai-Power, is equivalent to the fibration of (finitary, cartesian) polynomial monads. This equivalence is induced by the equivalence of lax monoidal fibrations of amalgamated signatures, polynomial diagrams, and polynomial (finitary, endo) functors. Finally, we develop a similar theory for symmetric signatures, analytic diagrams (a notion introduced here), and (finitary, multivariable) analytic (endo)functors. Among other things we show that the fibrations of symmetric multicategories is equivalent to the fibration of analytic monads. We also give a characterization of such a fibration of analytic monads. An object of this fibration is a weakly cartesian monad on a slice of Set whose functor parts is a finitary functors weakly preserving wide pullbacks. A morphism of this fibration is a weakly cartesian morphism of monads whose functor part is a pullback functor.

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