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arxiv: 1612.00589 · v1 · pith:SOHQD5UWnew · submitted 2016-12-02 · 🧮 math.CO

Graphs with two main and two plain eigenvalues

classification 🧮 math.CO
keywords graphsplaineigenvaluesmaincharacterizationsconceptseigenvaluefocus
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In this paper, we introduce the concepts of the plain eigenvalue, the main-plain index and the refined spectrum of graphs. We focus on the graphs with two main and two plain eigenvalues and give some characterizations of them.

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