English

The automorphisms of generalized cyclic Azumaya algebras

Rings and Algebras 2021-04-13 v1

Abstract

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

Keywords

Cite

@article{arxiv.1904.12563,
  title  = {The automorphisms of generalized cyclic Azumaya algebras},
  author = {S Pumpluen},
  journal= {arXiv preprint arXiv:1904.12563},
  year   = {2021}
}

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18 pages