Bounded complexes of permutation modules
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- by David J. Benson and Jon F. Carlson HTML | PDF
- Proc. Amer. Math. Soc. Ser. B 8 (2021), 349-357
Abstract:
Let $k$ be a field of characteristic $p > 0$. For $G$ an elementary abelian $p$-group, there exist collections of permutation modules such that if $C^*$ is any exact bounded complex whose terms are sums of copies of modules from the collection, then $C^*$ is contractible. A consequence is that if $G$ is any finite group whose Sylow $p$-subgroups are not cyclic or quaternion, and if $C^*$ is a bounded exact complex such that each $C^i$ is a direct sum of one dimensional modules and projective modules, then $C^*$ is contractible.References
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Additional Information
- David J. Benson
- Affiliation: Institute of Mathematics, Fraser Noble Building, University of Aberdeen, Aberdeen AB24 3UE, United Kingdom
- MR Author ID: 34795
- ORCID: 0000-0003-4627-0340
- Jon F. Carlson
- Affiliation: Department of Mathematics, University of Georgia, Athens, Georgia 30602
- MR Author ID: 45415
- Received by editor(s): December 6, 2020
- Received by editor(s) in revised form: June 22, 2021, and September 3, 2021
- Published electronically: November 23, 2021
- Additional Notes: The second author was partially supported by Simons Foundation Grant 054813-01. This work was supported by EPSRC grant number EP/R014604/1
- Communicated by: Sarah Witherspoon
- © Copyright 2021 by the authors under Creative Commons Attribution-Noncommercial 3.0 License (CC BY NC 3.0)
- Journal: Proc. Amer. Math. Soc. Ser. B 8 (2021), 349-357
- MSC (2020): Primary 20J06, 20C20
- DOI: https://doi.org/10.1090/bproc/102
- MathSciNet review: 4344558