Mathematics – Algebraic Topology
Scientific paper
2007-09-25
Mathematics
Algebraic Topology
16 pages, uses xy-pic, improved exposition, submitted
Scientific paper
We study the connection between the Goodwillie tower of the identity and the lower central series of the loop group on connected spaces. We define the simplicial theory of homotopy n-nilpotent groups. This notion interpolates between infinite loop spaces and loop spaces. We prove that the set-valued algebraic theory obtained by applying $\pi_0$ is the theory of ordinary n-nilpotent groups and that the Goodwillie tower of a connected space is determined by a certain homotopy left Kan extension. We prove that n-excisive functors of the form $\Omega F$ have values in homotopy n-nilpotent groups.
Biedermann Georg
Dwyer William G.
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