The intersection of normal closed subsets of an association scheme is not always normal

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概要

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• There has been a question that the intersection of normal closed subsets of an association scheme is also a normal closed subset. A. Hanaki proved the answer of this question is true for group-like association schemes [4]. We found counterexamples for this question by using GAP4 and a list of association schemes by A. Hanaki and I. Miyamoto [2] and [3].

• 信州大学の論文
• 2006-03-24

著者

• Yoshikawa Masayoshi

  Department Of Mathematical Sciences Interdisciplinary Graduate School Of Science And Technology Shin

• Yoshikawa Masayoshi

  Department Of Mathematical Sciences Interdisciplinary Graduate School Of Science And Technology Shin

関連論文

• The modular adjacency algebras of non-symmetric imprimitive association schemes of class 3
• The intersection of normal closed subsets of an association scheme is not always normal

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