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math.CO2009
Four-class Skew-symmetric Association Schemes
Jianmin Ma, Kaishun Wang
An association scheme is called skew-symmetric if it has no symmetric adjacency relations other than the diagonal one. In this paper, we study 4-class skew-symmetric association sc…
math.CO2009★ 4 cited
Nonexistence of Certain Skew-symmetric Amorphous Association Schemes
Jianmin Ma
An association scheme is amorphous if it has as many fusion schemes as possible. Symmetric amorphous schemes were classified by A. V. Ivanov [A. V. Ivanov, Amorphous cellular rings…