The automorphisms of generalized cyclic Azumaya algebras

We define a nonassociative generalization of cyclic Azumaya algebras employing skew polynomial rings D[t;σ], where D is an Azumaya algebra of constant rank with center C and σ an automorphism of D, such that σ|C has finite order. The automorphisms of these algebras are canonically induced by ring au...

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Veröffentlicht in:Journal of pure and applied algebra 2021-04, Vol.225 (4), p.106540, Article 106540
1. Verfasser: Pumplün, S.
Format: Artikel
Sprache:eng
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Zusammenfassung:We define a nonassociative generalization of cyclic Azumaya algebras employing skew polynomial rings D[t;σ], where D is an Azumaya algebra of constant rank with center C and σ an automorphism of D, such that σ|C has finite order. The automorphisms of these algebras are canonically induced by ring automorphisms of the skew polynomial ring D[t;σ] used in their construction. We achieve a description of their inner automorphisms. Results on the automorphisms of classical Azumaya algebras and central simple algebras of this type are obtained as special cases.
ISSN:0022-4049
1873-1376
DOI:10.1016/j.jpaa.2020.106540