English

Ravenel's May spectral sequence collapses immediately at large primes

Algebraic Topology 2023-12-29 v1

Abstract

At large primes, the height nn Ravenel-May spectral sequence takes as input the cohomology of a certain solvable Lie Fp\mathbb{F}_p-algebra, and produces as output the mod pp cohomology of the height nn strict Morava stabilizer group scheme. We construct simultaneous integral deformations of the height nn Morava stabilizer algebras and related objects, and we use them to prove that, for fixed nn, the height nn Ravenel-May spectral sequence collapses for all sufficiently large primes pp. Consequently, for large pp, the mod pp cohomology of the strict Morava stabilizer group scheme is the cohomology of a finite-dimensional solvable Lie algebra, and is computable algorithmically.

Keywords

Cite

@article{arxiv.2312.17185,
  title  = {Ravenel's May spectral sequence collapses immediately at large primes},
  author = {A. Salch},
  journal= {arXiv preprint arXiv:2312.17185},
  year   = {2023}
}
R2 v1 2026-06-28T14:03:57.673Z