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math.CO2023
More on -cross -intersecting families for vector spaces
Tian Yao, Dehai Liu, Kaishun Wang
Let be a finite dimensional vector space over a finite field. Suppose that , , , are -cross -intersecting families of…
math.CO2023
Weakly distance-regular circulants, I
Akihiro Munemasa, Kaishun Wang, Yuefeng Yang +1
We classify certain non-symmetric commutative association schemes. As an application, we determine all the weakly distance-regular circulants of one type of arcs by using Schur rin…
math.CO2023
Weakly distance-regular digraphs whose underlying graphs are distance-regular, I
Yuefeng Yang, Qing Zeng, Kaishun Wang
Weakly distance-regular digraphs are a natural directed version of distance-regular graphs. In [8], the third author and Suzuki proposed a question when an orientation of a distanc…