On generic $G$-graded Azumaya algebras
Abstract
Let be an algebraically closed field of characteristic zero and let be a finite group. Consider -graded simple algebras which are finite dimensional and -central over , i.e. . For any such algebra we construct a \textit{generic} -graded algebra which is \textit{Azumaya} in the following sense. \textit{Correspondence of ideals}: There is one to one correspondence between the -graded ideals of and the ideals of the ring , the -center of . \textit{Artin-Procesi condition}: satisfies the -graded identities of and no nonzero -graded homomorphic image of satisfies properly more identities. \textit{Generic}: If is a -graded algebra over a field then it is a specialization of along an ideal if and only if it is a -graded form of over its -center. We apply this to characterize finite dimensional -graded simple algebras over that admit a -graded division algebra form over their -center.
Cite
@article{arxiv.2008.00976,
title = {On generic $G$-graded Azumaya algebras},
author = {Eli Aljadeff and Yakov Karasik},
journal= {arXiv preprint arXiv:2008.00976},
year = {2022}
}
Comments
35 pages