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检索条件"作者=jack Koolen"
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Twice Q-polynomial distance-regular graphs of diameter 4
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Science China Mathematics 2015年 第12期58卷 2683-2690页
作者: MA JianMin koolen jack H. College of Mathematics & Information Science and Hebei Key Lab of Computational Mathematics & Applications Hebei Normal University School of Mathematical Sciences University of Science and Technology of China
It is known that a distance-regular graph with valency k at least three admits at most two Qpolynomial structures. We show that all distance-regular graphs with diameter four and valency at least three admitting two Q... 详细信息
来源: 维普期刊数据库 维普期刊数据库 同方期刊数据库 同方期刊数据库 评论
Problems on Graphs with Fixed Smallest Eigenvalue
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Algebra Colloquium 2020年 第1期27卷 51-54页
作者: jack koolen Qianqian Yang Wen-Tsun Wu Key Laboratory of CAS School of Mathematical Sciences University of Science and Technology of ChinaHefei 230026China School of Mathematical Sciences University of Science and Technology of China Hefei 230026China
In this note we give several problems and conjectures on graphs with fixed smallest eigenvalue.
来源: 维普期刊数据库 维普期刊数据库 评论