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The Goodwillie tower and the EHP sequence

About this Title

Mark Behrens, Department of Mathematics, Massachusetts Institute of Technology, Cambridge, MA 02139

Publication: Memoirs of the American Mathematical Society
Publication Year: 2012; Volume 218, Number 1026
ISBNs: 978-0-8218-6902-4 (print); 978-0-8218-9014-1 (online)
DOI: https://doi.org/10.1090/S0065-9266-2011-00645-3
Published electronically: November 21, 2011
Keywords: Unstable homotopy groups of spheres, Goodwillie calculus, EHP sequence, Dyer-Lashof operations
MSC: Primary 55Q40; Secondary 55Q15, 55Q25, 55S12

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Table of Contents

Chapters

  • Introduction
  • 1. Dyer-Lashof operations and the identity functor
  • 2. The Goodwillie tower of the EHP sequence
  • 3. Goodwillie filtration and the $P$ map
  • 4. Goodwillie differentials and Hopf invariants
  • 5. EHPSS differentials
  • 6. Calculations in the $2$-primary Toda range
  • A. Transfinite spectral sequences associated to towers

Abstract

We study the interaction between the EHP sequence and the Goodwillie tower of the identity evaluated at spheres at the prime $2$. Both give rise to spectral sequences (the EHP spectral sequence and the Goodwillie spectral sequence, respectively) which compute the unstable homotopy groups of spheres. We relate the Goodwillie filtration to the $P$ map, and the Goodwillie differentials to the $H$ map. Furthermore, we study an iterated Atiyah-Hirzebruch spectral sequence approach to the homotopy of the layers of the Goodwillie tower of the identity on spheres. We show that differentials in these spectral sequences give rise to differentials in the EHP spectral sequence. We use our theory to recompute the $2$-primary unstable stems through the Toda range (up to the $19$-stem). We also study the homological behavior of the interaction between the EHP sequence and the Goodwillie tower of the identity. This homological analysis involves the introduction of Dyer-Lashof-like operations associated to M. Ching’s operad structure on the derivatives of the identity. These operations act on the mod $2$ stable homology of the Goodwillie layers of any functor from spaces to spaces.

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