A note on eigenvalues of Cayley graphs
arXiv (Cornell University)(2023)
摘要
A graph is called integral if all its eigenvalues are integers. A Cayley graph is called normal if its connection set is a union of conjugacy classes. We show that a non-empty integral normal Cayley graph for a group of odd order has an odd eigenvalue.
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关键词
05C50,05C25
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