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arXiv 1506.02112math.AT
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函子泰勒多项式的组合模型

Combinatorial models for Taylor polynomials of functors

Kristine Bauer, Rosona Eldred, Brenda Johnson, Randy McCarthy

摘要:

古德威利的同伦函子演算将一个多项式逼近的塔(泰勒塔)与一个固定空间上的拓扑空间的函子联系起来。我们定义了一个新的塔,变中心塔,函子的类别与一个固定的始对象,如代数下一个固定的环谱。我们构造这个新的塔使用元素的泰勒塔建设的鲍尔,约翰逊和麦卡锡函子的单纯模型类别,并显示如何不同的中心塔不同于泰勒塔的属性,其个别条款和收敛行为。我们证明,有一个组合模型的变化中心塔作为一个亲之间的等价关系的变化中心塔和塔的cosimplicial对象,这推广埃尔德雷德的cosimplicial模型有限阶段的泰勒塔。作为一个应用,我们提出了模型的德拉姆复杂的有理交换环谱由于Rezk的一方面,和Goodwillie和Waldhausen的另一方面,并使用我们的结果得出结论,这两个模型将是等价的,当扩展到$E_{\infty}$ -环谱。

英文摘要:

Goodwillie's calculus of homotopy functors associates a tower of polynomial approximations, the Taylor tower, to a functor of topological spaces over a fixed space. We define a new tower, the varying center tower, for functors of categories with a fixed initial object, such as algebras under a fixed ring spectrum. We construct this new tower using elements of the Taylor tower constructions of Bauer, Johnson, and McCarthy for functors of simplicial model categories, and show how the varying center tower differs from Taylor towers in terms of the properties of its individual terms and convergence behaviour. We prove that there is a combinatorial model for the varying center tower given as a pro-equivalence between the varying center tower and towers of cosimplicial objects; this generalizes Eldred's cosimplicial models for finite stages of Taylor towers. As an application, we present models for the de Rham complex of rational commutative ring spectra due to Rezk on the one hand, and Goodwillie and Waldhausen on the other, and use our result to conclude that these two models will be equivalent when extended to $E_{\infty}$-ring spectra.

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