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摘要: 首先研究了两种特殊的运算—“移接变形”和“剖分(收缩)”对树的Laplace谱半径的影响,然后利用这些结论对具有较小Laplace谱半径的树进行了排序.Abstract: In the first two parts of this paper, we investigate two kinds of modifications and their relations with the Laplacian spectrum of trees, then give an order of trees which have smaller Laplacian spectra radius.
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Key words:
- Laplacian spectrumsubdivisioncontractiongraft /
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