On the nilpotency degree of the algebra with identity x^n=0

Details On the nilpotency degree of the algebra with identity x^n=0 On the nilpotency degree of the algebra with identity x^n=0

2011-06-06

arxiv.org/abs/1106.0950v3

Mathematics

Rings and Algebras

17 pages; v3. References are updated

Scientific paper

Denote by C_{n,d} the nilpotency degree of a relatively free algebra generated by d elements and satisfying the identity x^n=0. Under assumption that the characteristic p of the base field is greater than n/2, it is shown that C_{n,d} n/2. For p\neq2 the nilpotency degree C_{4,d} is described with deviation 4 for all d. As an application, a finite generating set for the algebra R^{GL(n)} of GL(n)-invariants of d matrices is established in terms of C_{n,d}. Several conjectures are formulated.

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