Abstract
We investigate the existence of integer matrices B satisfying the equation BBT = rI + sJ where T denotes transpose, r and s are integers, I is the identity matrix and J is the matrix with every element +1.
We investigate the existence of integer matrices B satisfying the equation BBT = rI + sJ where T denotes transpose, r and s are integers, I is the identity matrix and J is the matrix with every element +1.
Publication Details
Jennifer Seberry Wallis, Combinatorial matrices, Bulletin of the Australian Mathematical Society, 5, (1971), 285-286.