ROCHA, J. I.; http://lattes.cnpq.br/5414386936417209; ROCHA, Josefa Itailma da.
Abstract:
In this work we use Young’s Theory for representations of the symmetric groups in
the study of PI-algebras. Amitai Regev (1972) introduced the concepts of codimension
and cocharacter of PI-algebras, which are the main tools in this study. We first present
the Hook Theorem, which was proved by Amitsur and Regev in 1982. This theorem
refers to the behavior of the sequence of cocharacters of a PI-algebra, giving conditions
for an irreducible character of the group Sn to appear with nonzero multiplicity in the
decomposition of the cocharacter of this PI-algebra. We also present three applications
of this theorem, including the Amitsur’s theorem, which ensures that all PI-algebra
satisfies a power of a standard polynomial. Finally, we study the results of Amitsur
and Regev (1982) about a type identity that generalizes the Capelli identities
