English

Commutative association schemes obtained from twin prime powers, Fermat primes, Mersenne primes

Combinatorics 2019-11-21 v2

Abstract

For prime powers qq and q+εq+\varepsilon where ε{1,2}\varepsilon\in\{1,2\}, an affine resolvable design from Fq\mathbb{F}_q and Latin squares from Fq+ε\mathbb{F}_{q+\varepsilon} yield a set of symmetric designs if ε=2\varepsilon=2 and a set of symmetric group divisible designs if ε=1\varepsilon=1. We show that these designs derive commutative association schemes, and determine their eigenmatrices.

Keywords

Cite

@article{arxiv.1709.08150,
  title  = {Commutative association schemes obtained from twin prime powers, Fermat primes, Mersenne primes},
  author = {Hadi Kharaghani and Sho Suda},
  journal= {arXiv preprint arXiv:1709.08150},
  year   = {2019}
}

Comments

17 pages