The graph Kre(4) does not exist
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DOI: 10.1134/s1064562417040123
Abstract: Suppose that a strongly regular graph Γ with parameters (v, k, λ, μ) has eigenvalues k, r, and s. If the graphs Γ and $$\bar \Gamma $$Γ¯ are connected, then the following inequalities, known as… read more here.
Keywords: krein; graph kre; kre exist; graph parameters ... See more keywords