Algebraic $K$-theory of $\operatorname {THH}(\mathbb {F}_p)$
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- by Haldun Özgür Bayındır and Tasos Moulinos PDF
- Trans. Amer. Math. Soc. 375 (2022), 4177-4207 Request permission
Abstract:
In this work we study the $E_{\infty }$-ring $\operatorname {THH}(\mathbb {F}_p)$ as a graded spectrum. Following an identification at the level of $E_2$-algebras with $\mathbb {F}_p[\Omega S^3]$, the group ring of the $E_1$-group $\Omega S^3$ over $\mathbb {F}_p$, we show that the grading on $\operatorname {THH}(\mathbb {F}_p)$ arises from decomposition on the cyclic bar construction of the pointed monoid $\Omega S^3$. This allows us to use trace methods to compute the algebraic $K$-theory of $\operatorname {THH}(\mathbb {F}_p)$. We also show that as an $E_2$ $H\mathbb {F}_p$-ring, $\operatorname {THH}(\mathbb {F}_p)$ is uniquely determined by its homotopy groups. These results hold in fact for $\operatorname {THH}(k)$, where $k$ is any perfect field of characteristic $p$. Along the way we expand on some of the methods used by Hesselholt-Madsen and later by Speirs to develop certain tools to study the THH of graded ring spectra and the algebraic $K$-theory of formal DGAs.References
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Additional Information
- Haldun Özgür Bayındır
- Affiliation: Department of Mathematics, City, University of London, London EC1V 0HB, United Kingdom
- Tasos Moulinos
- Affiliation: Institut de Mathématiques de Toulouse, Université Paul Sabatier, 118 route de Narbonne 31062 Toulouse Cedex 9, France
- MR Author ID: 1137307
- Received by editor(s): May 20, 2021
- Received by editor(s) in revised form: October 7, 2021
- Published electronically: March 4, 2022
- Additional Notes: The first author acknowledges support from the project ANR-16-CE40-0003 ChroK. The second author was supported by grant NEDAG ERC-2016-ADG-741501 during the writing of this work
- © Copyright 2022 American Mathematical Society
- Journal: Trans. Amer. Math. Soc. 375 (2022), 4177-4207
- MSC (2020): Primary 55P99, 19D99
- DOI: https://doi.org/10.1090/tran/8613
- MathSciNet review: 4419056