Graphs with many valencies and few eigenvalues
نویسندگان
چکیده
منابع مشابه
Graphs with many valencies and few eigenvalues
Dom de Caen posed the question whether connected graphs with three distinct eigenvalues have at most three distinct valencies. We do not answer this question, but instead construct connected graphs with four and five distinct eigenvalues and arbitrarily many distinct valencies. The graphs with four distinct eigenvalues come from regular two-graphs. As a side result, we characterize the disconne...
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ژورنال
عنوان ژورنال: The Electronic Journal of Linear Algebra
سال: 2015
ISSN: 1081-3810
DOI: 10.13001/1081-3810.2987