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Fundamentalnaya i Prikladnaya Matematika, 2022, Volume 24, Issue 2, Pages 23–35
(Mi fpm1928)
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Real division algebras with a nontrivial reflection
D. Gokala, E. Napedeninab, M. Tvalavadzea a Department of Mathematical and Computational Sciences, University of Toronto Mississauga,
3359 Mississauga Road N., Mississauga, On L5L 1C6 Canada
b Plekhanov Russian University of Economics, Stremyannyy Pereulok, 36, Moscow, 115093 Russia
Abstract:
In this note, we consider four-dimensional unital real division algebras $\mathcal A$ with $\operatorname{Aut}(\mathcal A)$ containing a nontrivial reflection $\varphi$ (i.e., an automorphism of order two). If such an algebra $\mathcal A$ is a $\mathbb C$-bimodule, then we describe its multiplication table and state division conditions in terms of certain polynomials. Finally, we suggest a new method (different from the duplication process) that can be used to construct families of four-dimensional division algebras $\mathcal A$ with $\mathfrak{Der} (\mathcal A) =\{0\}$, which are generally not third power-associative or quadratic. Under some restrictions on algebra coefficients, we have listed all possible types of their automorphism groups.
Citation:
D. Gokal, E. Napedenina, M. Tvalavadze, “Real division algebras with a nontrivial reflection”, Fundam. Prikl. Mat., 24:2 (2022), 23–35; J. Math. Sci., 275:4 (2023), 393–402
Linking options:
https://www.mathnet.ru/eng/fpm1928 https://www.mathnet.ru/eng/fpm/v24/i2/p23
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Abstract page: | 73 | Full-text PDF : | 16 | References: | 16 |
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