A note on skew spectrum of graphs
classification
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skewgraphspolynomialspectrumalgebraanswerapplcavers
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We give some properties of skew spectrum of a graph, especially, we answer negatively a problem concerning the skew characteristic polynomial and matching polynomial in [M. Cavers et al., Skew-adjacency matrices of graphs, Linear Algebra Appl. 436 (2012) 4512--4529].
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