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arXiv 1507.01909math.AT
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高阶等变切除

Higher Equivariant Excision

Emanuele Dotto

摘要:

本文对$G$ -等变同伦理论之间的函子建立了Goodwillie演算理论,其中$G$是有限群.对任意有限$G$ -集$J$构造同伦函子的$J$ -消去逼近.它们合在一起形成一个偏序集,即Goodwillie树,它扩展了经典的Goodwillie塔。我们证明了一个函子树的收敛结果指向$G$ -空间,与不动点交换,我们重新解释汤姆迪克分裂作为一个更普遍的分裂现象,发生在这些函子的等变导数的不动点的一个实例。作为我们的主要例子,我们描述了层的树的单位函子的等变Spanier-Whitehead的划分复合物。

英文摘要:

We develop a theory of Goodwillie calculus for functors between $G$-equivariant homotopy theories, where $G$ is a finite group. We construct $J$-excisive approximations of a homotopy functor for any finite $G$-set $J$. These fit together into a poset, the Goodwillie tree, that extends the classical Goodwillie tower. We prove convergence results for the tree of a functor on pointed $G$-spaces that commutes with fixed-points, and we reinterpret the Tom Dieck-splitting as an instance of a more general splitting phenomenon that occurs for the fixed-points of the equivariant derivative of these functors. As our main example we describe the layers of the tree of the identity functor in terms of the equivariant Spanier-Whitehead duals of the partition complexes.

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