نتایج جستجو برای: integral graphs

تعداد نتایج: 211307  

Journal: :Mathematical Sciences 2019

Journal: :Linear Algebra and its Applications 2007

Journal: :Publikacije Elektrotehnickog fakulteta - serija: matematika 2002

Journal: :The Electronic Journal of Combinatorics 2009

Journal: :Discrete Mathematics 2004
Ligong Wang Xueliang Li Cornelis Hoede

A graph is called integral if all the eigenvalues of its adjacency matrix are integers. In this paper, we give a useful sufficient and necessary condition for complete r-partite graphs to be integral, from which we can construct infinite many new classes of such integral graphs. It is proved that the problem of finding such integral graphs is equivalent to the problem of solving some Diophantin...

Journal: :Linear Algebra and its Applications 2008

Journal: :Applicable Analysis and Discrete Mathematics 2007

Journal: :Discrete Mathematics 1999

Journal: :Discrete Mathematics 2008

Journal: :Ars Mathematica Contemporanea 2015

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