English

On two-quotient strong starters for $\mathbb{F}_q$

Combinatorics 2022-01-21 v3

Abstract

Let GG be a finite additive abelian group of odd order nn, and let G=G{0}G^*=G\setminus\{0\} be the set of non-zero elements. A starter for GG is a set S={{xi,yi}:i=1,,n12}S=\{\{x_i,y_i\}:i=1,\ldots,\frac{n-1}{2}\} such that {x1,,xn12,y1,,yn12}=G\{x_1,\ldots,x_\frac{n-1}{2},y_1,\ldots,y_\frac{n-1}{2}\}=G^* and {±(xiyi):i=1,,n12}=G\{\pm(x_i-y_i):i=1,\ldots,\frac{n-1}{2}\}=G^*. Moreover, if {xi+yi:i=1,,n12}=n12\left|\left\{x_i+y_i:i=1,\ldots,\frac{n-1}{2}\right\}\right|=\frac{n-1}{2}, then SS is called a strong starter for GG. A starter SS for GG is a kk quotient starter if there exists QGQ\subseteq G^* of cardinality kk such that yi/xiQy_i/x_i\in Q or xi/yiQx_i/y_i\in Q, for i=1,,n12i=1,\ldots,\frac{n-1}{2}. In this paper, we give examples of two-quotient strong starters for Fq\mathbb{F}_q, where q=2kt+1q=2^kt+1 is a prime power with k>1k>1 a positive integer and tt an odd integer greater than 1.

Cite

@article{arxiv.1609.05496,
  title  = {On two-quotient strong starters for $\mathbb{F}_q$},
  author = {Carlos A. Alfaro and Christian Rubio-Montiel and Adrián Vázquez-Ávila},
  journal= {arXiv preprint arXiv:1609.05496},
  year   = {2022}
}
R2 v1 2026-06-22T15:53:25.184Z