Baker, A. (2022) Endotrivial modules for the quaternion group and iterated Jokers in chromatic homotopy theory. arXiv, (doi: 10.48550/arXiv.2212.00437) (Unpublished)
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Abstract
The algebraic Joker module was originally described in the 1970s by Adams and Priddy and is a 5-dimensional module over the subHopf algebra A(1) of the mod 2 Steenrod algebra. It is a self-dual endotrivial module, i.e., an invertible object in the stable module category of A(1). Recently it has been shown that no analogues exist for A(n) with n>1. In previous work the author used doubling to produce an `iterated double Joker' which is an A(n)-module but not stably invertible. We also showed that for n=1,2,3 these iterated doubles were realisable as cohomology of CW spectra, but no such realisation existed for n>3. The main point of this paper is to show that in the height 2 chromatic context, the Morava K-theory of double Jokers realise an exceptional endotrivial module over the quaternion group of order 8 that only exists over a field of characteristic 2 containing a primitive cube root of unity. This has connections with certain Massey products in the cohomology of the quaternion group.
Item Type: | Articles |
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Keywords: | Stable homotopy theory, steenrod algebra, Lubin-Tate spectrum, Morava K-theory, endotrivial module. |
Status: | Unpublished |
Refereed: | No |
Glasgow Author(s) Enlighten ID: | Baker, Dr Andrew |
Authors: | Baker, A. |
College/School: | College of Science and Engineering > School of Mathematics and Statistics > Mathematics |
Journal Name: | arXiv |
Published Online: | 01 December 2022 |
Copyright Holders: | Copyright © 2022 The Author |
Publisher Policy: | Reproduced under a Creative Commons licence |
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