Krein Parameters of Fiber-Commutative Coherent Configurations
Krein Parameters of Fiber-Commutative Coherent Configurations
复制标题
光纤交换相干配置的 Kerin 参数
DOI:
10.1142/s1005386720000024
复制
发表时间:
2020
影响因子:
0.3
通讯作者:
Munemasa Akihiro
中科院分区:
文献类型:
--
作者:
Ito Keiji;Munemasa Akihiro
For fiber-commutative coherent configurations, we show that Krein parameters can be defined essentially uniquely. As a consequence, the general Krein condition reduces to positive semidefiniteness of finitely many matrices determined by the parameters of a coherent configuration. We mention its implications in the coherent configuration defined by a generalized quadrangle. We also simplify the absolute bound using the matrices of Krein parameters.