Abstract
An Hadamard matrix H is a matrix of order n all of whose elements are + 1 or -1 and which satisfies H ffT = nIn . H = S + In is a skew-type Hadamard matrix if ST = -So It is conjectured that an Hadamard matrix always exists for n = 4t, t any integer. Many known matrices and classes of matrices can be found in [1].
Publication Details
Jennifer Seberry Wallis, A note on a class of Hadamard matrices, J.Combinatorial Theory, 6, (1969), 222-223.