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Notes on motivic infinite loop space theory

Tom Bachmann and Elden Elmanto

Vol. 6 (2025), 1–62
Abstract

In fall of 2019, the Thursday seminar at Harvard University studied motivic infinite loop space theory. As part of this, the authors gave a series of talks outlining the main theorems of the theory, together with their proofs, in the case of infinite perfect fields. In winter of 2021/2, Bachmann taught a topics course at LMU Munich on strict 𝔸1-invariance of framed presheaves (which is one of the main theorems, but was not covered in detail during the Thursday seminar). These are our extended notes on these topics.

Keywords
motivic homotopy, infinite loop spaces, framed correspondences
Mathematical Subject Classification
Primary: 14F42
Milestones
Received: 13 April 2022
Revised: 16 August 2022
Accepted: 16 August 2022
Published: 15 March 2025
Authors
Tom Bachmann
Institut für Mathematik
Johannes Gutenberg-Universität Mainz
Mainz
Germany
Elden Elmanto
Department of Mathematics
University of Toronto
Toronto
Canada