Abstract
Orthogonal arrays (OAs), mixed level or fixed level (asymmetric or symmetric), are useful in the design of various experiments. They are also a fundamental tool in the construction of various combinatorial configurations. In this paper, we establish a general “expansive replacement method” for constructing mixedlevel OAs of an arbitrary strength. As a consequence, a positive answer to the question about orthogonal arrays posed by Hedayat, Sloane and Stufken is given. Some series of mixed level OAs of strength ⩾ 3 are produced.
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Jiang, L., Yin, J. An approach of constructing mixed-level orthogonal arrays of strength ⩾ 3. Sci. China Math. 56, 1109–1115 (2013). https://doi.org/10.1007/s11425-013-4616-y
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DOI: https://doi.org/10.1007/s11425-013-4616-y