Primitive Commutative Association Scheme
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Mitsugu Hirasaka
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Article
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2000
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Elsevier Science
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English
β 247 KB
Let (X, [R i ] 0 i d ) be a primitive commutative association scheme. If there is a non-symmetric relation R i with valency 3, then the cardinality of X is equal to either p or p 2 where p is an odd prime. Moreover, if |X | = p then (X, [R i ] 0 i d ) is isomorphic to a cyclotomic scheme.