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Characters of association schemes containing a strongly normal closed subset of prime index |
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| Authors: | Akihide Hanaki |
| Institution: | Faculty of Science, Shinshu University, Matsumoto, 390-8621, Japan |
| Abstract: | We consider a relation between characters of an association scheme and its strongly normal closed subsets with prime index. As an application of our result, we show that an association scheme of prime square order with a proper strongly normal closed subset is commutative. |
| Keywords: | Association scheme strongly normal closed subset character Clifford theory group-graded algebra |
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