English

$K$-theoretic counterexamples to Ravenel's telescope conjecture

Algebraic Topology 2023-10-27 v1 K-Theory and Homology

Abstract

At each prime pp and height n+12n+1 \ge 2, we prove that the telescopic and chromatic localizations of spectra differ. Specifically, for Z\mathbb{Z} acting by Adams operations on BPn\mathrm{BP}\langle n \rangle, we prove that the T(n+1)T(n+1)-localized algebraic KK-theory of BPnhZ\mathrm{BP}\langle n \rangle^{h\mathbb{Z}} is not K(n+1)K(n+1)-local. We also show that Galois hyperdescent, A1\mathbb{A}^1-invariance, and nil-invariance fail for the K(n+1)K(n+1)-localized algebraic KK-theory of K(n)K(n)-local E\mathbb{E}_{\infty}-rings. In the case n=1n=1 and p7p \ge 7 we make complete computations of T(2)K(R)T(2)_*\mathrm{K}(R), for RR certain finite Galois extensions of the K(1)K(1)-local sphere. We show for p5p\geq 5 that the algebraic KK-theory of the K(1)K(1)-local sphere is asymptotically L2fL_2^{f}-local.

Keywords

Cite

@article{arxiv.2310.17459,
  title  = {$K$-theoretic counterexamples to Ravenel's telescope conjecture},
  author = {Robert Burklund and Jeremy Hahn and Ishan Levy and Tomer M. Schlank},
  journal= {arXiv preprint arXiv:2310.17459},
  year   = {2023}
}

Comments

100 pages. Comments very welcome

R2 v1 2026-06-28T13:02:51.396Z