论文信息 - A Characterization of Association Schemes from Affine Spaces

A Characterization of Association Schemes from Affine Spaces

We characterize theassociation schemes from affine spaces as the association schemesin which all relations are equivalence relations (when unitedwith the identity relation). The schemes from affine spaces ofdimension at least three are counterexamples of a conjectureof A. V. Ivanov [Problem 1.3]I on amorphic schemes.

Edwin R. van Dam

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