A (maximal) difference matrix with r rows over a group G of order s gives rise to a (maximal) set of r -1 mutually orthogonal Latin squares of order s. The row sizes of maximal difference matrices are determined for all groups G of order ~<10.
Maximal difference matrices of order q
β Scribed by Alexander Pott
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 310 KB
- Volume
- 1
- Category
- Article
- ISSN
- 1063-8539
No coin nor oath required. For personal study only.
β¦ Synopsis
Abstract
Recently, A. B. Evans proved the following Theorem: There is a maximal set of (p β 3)/2 [(resp. (p β 1)/2] mutually orthogonal Latin squares of order p if p is a prime p β‘ 3 mod 4 (resp. p β‘ 1 mod 4). In this article I will give a slightly different proof using more geometric arguments and results of RΓ©dei. Further, I discuss possible generalizations of Evans' Theorem to the case of Latin squares whose order is a prime power. Β© 1993 John Wiley & Sons, Inc.
π SIMILAR VOLUMES
Koukouvinos, C. and J. Seberry, Hadamard matrices of order =8(mod 16) with maximal excess, Discrete Mathematics 92 (1991) 173-176. Kounias and Farmakis, in 'On the excess of Hadamard matrices', Discrete Math. 68 (1988) 59-69, showed that the maximal excess (or sum of the elements) of an Hadamard mat
Szekeres has established the ex:stence of a skew-Hadamard malrix of order 2(9 + 1) in the case 9 = 5 (mods), a prime power. His method utilized complemlcntary difference sets in the elementary abelian group of order 9. The main result of this paper is to show that, for the same 9, there exist skew-H