English

A primitive normal pair in a finite field with prescribed traces and norms

Number Theory 2024-06-06 v2

Abstract

Given Fpt{\mathbb{F}_{p^t}}, a field with ptp^t elements, where pp is a prime power, tt is a positive integer. Let f(x)f(x) be a polynomial over Fpt\mathbb{F}_{p^t} of degree mm with some restrictions. In this paper, we construct a sufficient condition on (p,t)(p,t) which guarantees the existence of a primitive normal pair (ϵ,f(ϵ))(\epsilon,f(\epsilon)) such that TrFpt/Fp(ϵ)=aTr_{\mathbb{F}_{p^t}/\mathbb{F}_p}(\epsilon)=a, TrFpt/Fp(f(ϵ))=bTr_{\mathbb{F}_{p^t}/\mathbb{F}_p}(f(\epsilon))=b and NFpt/Fp(ϵ)=cN_{\mathbb{F}_{p^t}/\mathbb{F}_p}(\epsilon)=c, NFpt/Fp(f(ϵ))=dN_{\mathbb{F}_{p^t}/\mathbb{F}_p}(f(\epsilon))=d where c,dFpc,d\in\mathbb{F}_{p} are primitive elements and a,bFpa,b\in\mathbb{F}_{p}^*. Furthermore, we demonstrate that, for p=11k;p=11^k; k1,k\geq1, m=8m=8 and t15t\geq 15, there are only 44 possible exceptions where such pairs may not exist.

Keywords

Cite

@article{arxiv.2308.02846,
  title  = {A primitive normal pair in a finite field with prescribed traces and norms},
  author = {Kaustav Chatterjee and Hariom Sharma and Shailesh Kumar Tiwari},
  journal= {arXiv preprint arXiv:2308.02846},
  year   = {2024}
}

Comments

The paper is not much impactful and weak result