Publication Details

Jennifer Seberry Wallis, Hadamard designs, Bulletin of the Australian Mathematical Society, 2, (1970), 45-54. 


In this paper it is shown that an Hadamard design with each letter repeated once and only once can exist for 2, 4 and 8 letters only. L.D. Baumert and Marshall Hall, Jr have found a design with four letters each repeated three times. Their design and the design on four letters each repeated once, found by J. Williamson, is the totality previously published.