Operations on spectral partition Lie algebras and TAQ cohomology

We determine all natural operations and their relations on the homotopy groups of spectral partition Lie algebras, which coincide with F p -linear topological Andr-Quillen cohomology operations at any prime.We construct unary operations and a shifted restricted Lie algebra structure on the homotopy groups of spectral partition Lie algebras.Then we prove a composition law for the unary operations, as well as a compatibility condition between unary operations and the shifted Lie bracket with restriction up to a unit for the restriction.Comparing with Brantner and Mathew's result on the ranks of the homotopy groups of free spectral partition Lie algebras, we deduce that these generate all natural operations, thereby also recovering unpublished results of Kriz and of Basterra and Mandell on F p -linear TAQ cohomology operations.As a corollary, we determine the structure of natural operations on mod p S-linear TAQ cohomology.

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Publication Details

Journal
Geometry & Topology
Published
2025-12-31
DOI
https://doi.org/10.2140/gt.2025.29.4477
Primary Topic
Advanced Topics in Algebra
Type
article
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article

Operations on spectral partition Lie algebras and TAQ cohomology

Adela YiYu Zhang
Geometry & Topology
Advanced Topics in Algebra
article

Operations on spectral partition Lie algebras and TAQ cohomology

Adela YiYu Zhang
article en

Abstract

We determine all natural operations and their relations on the homotopy groups of spectral partition Lie algebras, which coincide with F p -linear topological Andr-Quillen cohomology operations at any prime.We construct unary operations and a shifted restricted Lie algebra structure on the homotopy groups of spectral partition Lie algebras.Then we prove a composition law for the unary operations, as well as a compatibility condition between unary operations and the shifted Lie bracket with restriction up to a unit for the restriction.Comparing with Brantner and Mathew's result on the ranks of the homotopy groups of free spectral partition Lie algebras, we deduce that these generate all natural operations, thereby also recovering unpublished results of Kriz and of Basterra and Mandell on F p -linear TAQ cohomology operations.As a corollary, we determine the structure of natural operations on mod p S-linear TAQ cohomology.

Geometry & TopologyVol. 29(9)
University of Copenhagen (DK)
Openalex Percentile: Top 14%
Advanced Topics in Algebra
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