Browsing FEF - Makale Koleksiyonu | Matematik Bölümü / Department of Mathematics by Publisher "Charles Babbage Res Ctr"
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(Charles Babbage Res Ctr, 2011-07)A cograph is a P-4-free graph. We first give a short proof of the fact that 0 (-1) belongs to the spectrum of a connected cograph (with at least two vertices) if and only if it contains duplicate (resp. coduplicate) vertices. ...