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The automorphisms of generalized cyclic Azumaya algebras
Journal of Pure and Applied Algebra ( IF 0.7 ) Pub Date : 2021-04-01 , DOI: 10.1016/j.jpaa.2020.106540
S. Pumplün

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

中文翻译:

广义循环Azumaya代数的自同构

我们使用偏斜多项式环 $D[t;\sigma]$ 定义循环 Azumaya 代数的非关联泛化,其中 $D$ 是具有中心 $C$ 的恒定秩的 Azumaya 代数,$\sigma$ 是 $D$ 的自同构,使得 $\sigma|_{C}$ 具有有限阶。这些代数的自同构是由它们构造中使用的偏斜多项式环 $D[t;\sigma]$ 的环自同构规范诱导的。我们实现了对它们内部自同构的描述。经典 Azumaya 代数和这种类型的中心简单代数的自同构结果是作为特例获得的。
更新日期:2021-04-01
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