Multialternating graded polynomials and growth of polynomial identities

Details Multialternating graded polynomials and growth of polynomial identities Multialternating graded polynomials and growth of polynomial identities

2012-04-14

arxiv.org/abs/1204.3159v1

Mathematics

Rings and Algebras

To appear in Proc. of AMS

Scientific paper

Let G be a finite group and A a finite dimensional G-graded algebra over a field of characteristic zero. When A is simple as a G-graded algebra, by mean of Regev central polynomials we construct multialternating graded polynomials of arbitrarily large degree non vanishing on A. As a consequence we compute the exponential rate of growth of the sequence of graded codimensions of an arbitrary G-graded algebra satisfying an ordinary polynomial identity. In particular we show it is an integer. The result was proviously known in case G is abelian.

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