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A Nonregular Analogue of Conference Graphs

Journal of Combinatorial Theory. Series A (1999) 88(1) 194-204
DOI: 10.1006/jcta.1999.2983
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Abstract

We prove some results on graphs with three eigenvalues, not all integral; these are a natural generalization of the strongly regular conference graphs. We derive a Bruck-Ryser type condition and construct some (nonregular) examples. © 1999 Academic Press.

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De Caen, D., Van Dam, E. R., & Spence, E. (1999). A Nonregular Analogue of Conference Graphs. Journal of Combinatorial Theory. Series A, 88(1), 194–204. https://doi.org/10.1006/jcta.1999.2983

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