English

$r$-primitive $k$-normal polynomials over finite fields with last two coefficients prescribed

Number Theory 2025-04-17 v3

Abstract

Let ξFqm\xi\in\mathbb{F}_{q^m} be an rr-primitive kk-normal element over Fq\mathbb{F}_q, where qq is a prime power and mm is a positive integer. The minimal polynomial of ξ\xi is referred to be the rr-primitive kk-normal polynomial of ξ\xi over Fq\mathbb{F}_q. In this article, we study the existence of an rr-primitive kk-normal polynomial over Fq\mathbb{F}_q such that the last two coefficients are prescribed. In this context, first, we prove a sufficient condition which guarantees the existence of such a polynomial. Further, we compute all possible exceptional pairs (q,m)(q,m) in case of 33-primitive 11-normal polynomials for m7m\geq 7.

Keywords

Cite

@article{arxiv.2501.04999,
  title  = {$r$-primitive $k$-normal polynomials over finite fields with last two coefficients prescribed},
  author = {K. Chatterjee and R. K. Sharma and S. K. Tiwari},
  journal= {arXiv preprint arXiv:2501.04999},
  year   = {2025}
}
R2 v1 2026-06-28T21:00:48.148Z