English

Detecting $\beta$ elements in iterated algebraic K-theory

K-Theory and Homology 2022-10-14 v4 Algebraic Topology Number Theory

Abstract

The Lichtenbaum--Quillen conjecture (LQC) relates special values of zeta functions to algebraic K-theory groups. The Ausoni--Rognes red-shift conjectures generalize the LQC to higher chromatic heights in a precise sense. In this paper, we propose an alternate generalization of the LQC to higher chromatic heights and give evidence for it at height two. In particular, if the nn-th Greek letter family is detected by a commutative ring spectrum RR, then we conjecture that the n+1n+1-st Greek letter family will be detected by the algebraic K-theory of RR. We prove this in the case n=1n=1 for R=K(Fq)R=\text{K}(\mathbb{F}_q) modulo (p,v1)(p,v_1) where p5p\ge 5 and q=kq=\ell^k is a prime power generator of the units in Z/p2Z\mathbb{Z}/p^2\mathbb{Z}. In particular, we prove that the commutative ring spectrum K(K(Fq))\text{K}(\text{K}(\mathbb{F}_q)) detects the part of the pp-primary β\beta-family that survives mod (p,v1)(p,v_1). The method of proof also implies that these β\beta elements are detected in iterated algebraic K-theory of the integers. Consequently, one may relate iterated algebraic K-theory groups of the integers to integral modular forms satisfying certain congruences.

Keywords

Cite

@article{arxiv.1810.10088,
  title  = {Detecting $\beta$ elements in iterated algebraic K-theory},
  author = {Gabriel Angelini-Knoll},
  journal= {arXiv preprint arXiv:1810.10088},
  year   = {2022}
}

Comments

33 pages including references. To appear in Trans. Am. Math. Soc. This version may differ slightly from the published version

R2 v1 2026-06-23T04:50:30.814Z