𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Reversible and DRAD difference sets in

✍ Scribed by Jordan D. Webster


Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
119 KB
Volume
20
Category
Article
ISSN
1063-8539

No coin nor oath required. For personal study only.

✦ Synopsis


Abstract

The existence of Hadamard difference sets has been a central question in design theory. Reversible difference sets have been studied extensively. Dillon gave a method for finding reversible difference sets in groups of the form (C)^2^. DRAD difference sets are a newer concept. Davis and Polhill showed the existence of DRAD difference sets in the same groups as Dillon. This article determines the existence of reversible and DRAD difference sets in groups of the form (C)^3^. These are the only abelian 2‐groups outside of direct products of C~4~ and (C)^2^ known to contain reversible and DRAD difference sets. Β© 2011 Wiley Periodicals, Inc. J Combin Designs 20:58–67, 2012


πŸ“œ SIMILAR VOLUMES


Difference Sets and Recursion Theory
✍ James H. Schmerl πŸ“‚ Article πŸ“… 1998 πŸ› John Wiley and Sons 🌐 English βš– 411 KB

recursively enumerable set but which is not the difference set of any recursive set.

An extension of building sets and relati
✍ Xiang-dong Hou; Surinder K. Sehgal πŸ“‚ Article πŸ“… 2000 πŸ› John Wiley and Sons 🌐 English βš– 109 KB πŸ‘ 2 views

Building sets are a successful tool for constructing semi-regular divisible difference sets and, in particular, semi-regular relative difference sets. In this paper, we present an extension theorem for building sets under simple conditions. Some of the semi-regular relative difference sets obtained

Looking for difference sets in D2p Γ— Zq
✍ Emily H. Moore; Amanda Walker πŸ“‚ Article πŸ“… 2000 πŸ› John Wiley and Sons 🌐 English βš– 111 KB

We consider groups D 2p Γ‚ Z q , with p and q odd primes, q `p, and for which each prime dividing n has order p Γ€ 1 (mod p). If such a group contains a nontrivial difference set, D, our main theorem gives constraints on the parameters of D. This in turn rules out difference sets in some groups of thi

New partial difference sets in p-groups
✍ Xiang-Dong Hou πŸ“‚ Article πŸ“… 2002 πŸ› John Wiley and Sons 🌐 English βš– 110 KB

## Abstract Latin square type partial difference sets (PDS) are known to exist in __R__ Γ— __R__ for various abelian __p__‐groups __R__ and in β„€^__t__^. We construct a family of Latin square type PDS in β„€^__t__^ Γ— β„€^2__nt__^~__p__~ using finite commutative chain rings. When __t__ is odd, the ambient

Exponential number of inequivalent diffe
✍ James A. Davis; Deirdre L. Smeltzer πŸ“‚ Article πŸ“… 2003 πŸ› John Wiley and Sons 🌐 English βš– 140 KB

## Abstract Kantor [5] proved an exponential lower bound on the number of pairwise inequivalent difference sets in the elementary abelian group of order 2^2s+2^. Dillon [3] generalized a technique of McFarland [6] to provide a framework for determining the number of inequivalent difference sets in