English

The algebra of supernatural matrices

Rings and Algebras 2023-11-02 v1

Abstract

The algebra of supernatural matrices is a key example in the theory of locally finite central simple algebras, which studied in a previous paper of the authors (\cite{Local}). It is also a stand-alone object admits a rich study and various connections to other fields. The goal of this paper is to expose some new information about supernatural matrices, mainly in terms of the "inner" ways to identify such algebras, and their appearance as minimal solutions to equations of the form Mn(A)AM_n(A)\cong A. Viewing a natural representation of this algebra, we show that supernatural matrices generalize both McCrimmon's deep matrices algebra and mm-petal Leavitt path algebra. We also study their simple representations.

Keywords

Cite

@article{arxiv.2311.00053,
  title  = {The algebra of supernatural matrices},
  author = {Tamar Bar-On and Shira Gilat and Eli Matzri and Uzi Vishne},
  journal= {arXiv preprint arXiv:2311.00053},
  year   = {2023}
}