Abstract
The algebras that satisfy polynomial identities (so-called PI-algebras) form an important class of algebras, and therefore they have been attracting the attention of the algebraist. A polynomial identity of an algebra A is a polynomial f(x1,...,xn) in noncommutative variables such that f(a1,...,an)=0 in A for all a1,...,an in A. If there exist f(x1,...,xn) nonzero we say that A is a PI-al…