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Direct Constructions for General Families of Cyclic Mutually Nearly Orthogonal Latin Squares
Authors:Fatih Demirkale  Diane Donovan  Abdollah Khodkar
Affiliation:1. Department of Mathematics, Ko? University, Turkey;2. Department of Mathematics, The University of Queensland, Brisbane, QLD, Australia;3. Department of Mathematics, University of West Georgia, Carrollton, USA
Abstract:Two Latin squares urn:x-wiley:10638539:media:jcd21394:jcd21394-math-0001 and urn:x-wiley:10638539:media:jcd21394:jcd21394-math-0002, of even order n with entries urn:x-wiley:10638539:media:jcd21394:jcd21394-math-0003, are said to be nearly orthogonal if the superimposition of L on M yields an urn:x-wiley:10638539:media:jcd21394:jcd21394-math-0004 array urn:x-wiley:10638539:media:jcd21394:jcd21394-math-0005 in which each ordered pair urn:x-wiley:10638539:media:jcd21394:jcd21394-math-0006, urn:x-wiley:10638539:media:jcd21394:jcd21394-math-0007 and urn:x-wiley:10638539:media:jcd21394:jcd21394-math-0008, occurs at least once and the ordered pair urn:x-wiley:10638539:media:jcd21394:jcd21394-math-0009 occurs exactly twice. In this paper, we present direct constructions for the existence of general families of three cyclic mutually orthogonal Latin squares of orders urn:x-wiley:10638539:media:jcd21394:jcd21394-math-0010, urn:x-wiley:10638539:media:jcd21394:jcd21394-math-0011, urn:x-wiley:10638539:media:jcd21394:jcd21394-math-0012 and urn:x-wiley:10638539:media:jcd21394:jcd21394-math-0013. The techniques employed are based on the principle of Methods of Differences and so we also establish infinite classes of “quasi‐difference” sets for these orders.
Keywords:Latin squares  nearly orthogonal Latin squares  orthogonal Latin squares  quasi‐difference sets
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