A Proper \(n\)-Dimensional Orthogonal Design of Order \(8\) on \(8\) Indeterminates

Let \(x_1, x_2, \ldots, x_v\) be commuting indeterminates over the integers. We say an \(v \times v \times v \ldots \times v \) n-dimensional matrix is a proper \(v\)-dimensional orthogonal design of order \(v\) and type \((s_1, s_2, \ldots, s_r)\) (written \(\mathrm{OD}^n(s_1, s_2, \ldots, s_r)\)) on the indeterminates \(x_1, x_2, \ldots, x_r\) if every 2-dimensional axis-normal submatrix is an \(\mathrm{OD} (s_1, s_2, \ldots, s_r)\) of order \(v\) on the indeterminates \(x_1, x_2, \ldots, x_r\). Constructions for proper \(\mathrm{OD}^n(1^2)\) of order 2 and \(\mathrm{OD}^n(1^4)\) of order 4 are given in J. Seberry (1980) and J. Hammer and J. Seberry (1979, 1981a), respectively. This paper contains simple constructions for proper \(\mathrm{OD}^n(1^{2})\), \(\mathrm{OD}^n(1^{4})\), and \(\mathrm{OD}^n(1^{ 8})\) of orders 2, 4, and 8, respectively. Prior to this paper no proper higher dimensional OD on more than 4 indeterminates was known.