Skew Hadamard difference sets from the Ree--Tits slice symplectic spreads in PG(3,32h+1)

  • Authors:
  • Cunsheng Ding;Zeying Wang;Qing Xiang

  • Affiliations:
  • Department of Computer Science, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong;Department of Mathematical Sciences, University of Delaware, Newark, DE 19716, USA;Department of Mathematical Sciences, University of Delaware, Newark, DE 19716, USA

  • Venue:
  • Journal of Combinatorial Theory Series A
  • Year:
  • 2007

Quantified Score

Hi-index 0.06

Visualization

Abstract

Using a class of permutation polynomials of F"3"^"2"^"h"^"+"^"1 obtained from the Ree-Tits slice symplectic spreads in PG(3,3^2^h^+^1), we construct a family of skew Hadamard difference sets in the additive group of F"3"^"2"^"h"^"+"^"1. With the help of a computer, we show that these skew Hadamard difference sets are new when h=2 and h=3. We conjecture that they are always new when h3. Furthermore, we present a variation of the classical construction of the twin prime power difference sets, and show that inequivalent skew Hadamard difference sets lead to inequivalent difference sets with twin prime power parameters.