Geodesic
Modular Hadamard Matrices and Related Designs, II
Canadian journal of mathematics, Tome 24 (1972) no. 6, pp. 1100-1109

Voir la notice de l'article provenant de la source Cambridge University Press

An h by h matrix with entries ±1 is called a modular Hadamard matrix if the inner product of any two distinct row vectors is a multiple of a fixed (positive) integer n; such a matrix is also referred to as an “H(n, h) matrix” with parameters n and h. Modular Hadamard matrices and the related combinatorial designs were introduced in [2]; that paper was concerned mainly with two of the related designs, the “pseudo (ν, k, λ)- designs” and the “ (m, v, k1, λ1, k2, λ2, f, λ3)-designs” (the reader is referred to [2] for the definition of these designs). 
Marrero, O.; Butson, A. T. Modular Hadamard Matrices and Related Designs, II. Canadian journal of mathematics, Tome 24 (1972) no. 6, pp. 1100-1109. doi: 10.4153/CJM-1972-114-7
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[1] 1. Hall, M., Jr., Combinatorial theory (Blaisdell, Waltham, Mass., 1967). Google Scholar

[2] 2. Marrero, O. and Butson, A. T., Modular Hadamard matrices and related designs (to appear in J. Combinatorial Theory). Google Scholar

[3] 3. Ryser, H. J., Combinatorial mathematics (Wiley, New York, 1963). Google Scholar

[4] 4. Sprott, D. A., Some series of partially balanced incomplete block designs, Can. J. Math. 7 (1955), 369–381. Google Scholar

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