Existence of (3, 1, 2)‐conjugate orthogonal diagonal latin squares

Abstract

We shall refer to a diagonal Latin square which is orthogonal to its (3,1,2)-conjugate, and the latter is also a diagonal Latin square, as a (3,1, 2)-conjugate orthogonal diagonal Latin square, briefly CODLS. This article investigates the spectrum of CODLS and it is found that it contains all positive integers υ except 2, 3, 6, and possibly 10. © 2001 John Wiley & Sons, Inc. J Combin Designs 9: 297–308, 2001