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Polynomial identities and their numerical invariants

Grant number: 20/16595-7
Support type:Scholarships in Brazil - Master
Effective date (Start): December 01, 2021
Effective date (End): February 28, 2023
Field of knowledge:Physical Sciences and Mathematics - Mathematics - Algebra
Principal researcher:Plamen Emilov Kochloukov
Grantee:Kauê Orlando Pereira
Home Institution: Instituto de Matemática, Estatística e Computação Científica (IMECC). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Associated research grant:18/23690-6 - Structures, representations, and applications of algebraic systems, AP.TEM


We will study some topics in the Theory of algebras satisfying polynomial identities in this proposal for a Master Degree. We will approach the basics of the theory, namely polynomial identities, PI algebras, varieties of algebras, T-ideals, the linearization process, the homogeneous and the multilinear structures of relatively free algebras. To this end we shall need some facts from Ring theory such that the theorems due to Wedderburn and Artin, Wedderburn and Malcev, and also the theory of representations of the symmetric and of the general linear group. We shall cover the topics in the depth needed for our project. Moreover we shall study the notions of a codimension, codimension growth. We shall introduce the notion of the PI exponent of an algebra. We shall see the celebrated theorem due to A. Regev about the exponential growth of the codimensions, and we shall see how to apply it in order to prove another theorem due to Regev: that the tensor product of two PI algebras is once again a PI algebra. Afterwards we shall cover the theorem due to Giambruno and Zaicev that shows the PI exponent of an associative PI algebra in characteristic 0 always exists and is a nonnegative integer. Finally we shall describe the PI algebras whose codimensions are of polynomial growth.

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