Skip to main content

A chromatic approach to homological stability

Posted in
Speaker: 
Oscar Randal-Williams
Affiliation: 
University of Cambridge
Date: 
Tue, 19/05/2026 - 11:00 - 12:00
Location: 
MPIM Lecture Hall

I will explain a new point of view on the subject of homological stability inspired by aspects of chromatic stable homotopy theory. In this worldview, the usual stabilisation map plays the role of multiplication by $p$ on the $p$-local sphere spectrum $S_{(p)}$, and describing the stable homology (i.e., inverting this map) therefore plays the role of calculating the rational stable homotopy groups of spheres. The "secondary stabilisation maps" described by Galatius, Kupers, and I play the role of a $v_1$-self map on $S_{(p)}/p$, and describing the "secondary stable homology" plays the role of calculating the $v_1$-periodic stable homotopy groups of spheres. Adopting this point of view, several ideas from stable homotopy theory (finite localisations, Smith-Toda complexes, Adams periodicity, ...) can be applied to obtain a good qualitative understanding of what "higher order homological stability" should be about.

© MPI f. Mathematik, Bonn Impressum & Datenschutz
-A A +A