...谱图 特征值 似双星树 线图[gap=757]Key words: Laplacian spectrum; cospectral graphs; eigenvalue; double-starlike tree; line graphs...
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A double-starlike tree is a graph with two stars (whose sizes need not be equal) jointed by a path.
两个大小不一定相等的星图由一条路连接而成的图叫做似双星树。
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