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math.CO2026
On the existence of mixed orthogonal arrays of strength two with six factors
Xiuling Shan, Guangzhou Chen, Xiangrong Sun
Orthogonal arrays are foundational objects in combinatorial design theory and experimental design theory, with broad applications in computer science, coding theory, and cryptograp…
math.CO2026
Constructions of two-dimensional optical orthogonal codes of weight three
Xiuling Shan, Lidong Wang, Yanxun Chang +1
The study of optical orthogonal codes has been motivated by an application in an optical code-division multiple access system. This paper focuses on optimal two-dimensional optical…