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arXiv 0711.3497math.CO
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有界度的C4-free图的能量

The energy of C4-free graphs of bounded degree

Vladimir Nikiforov

摘要:

讨论了Gutman的一些问题,证明了除4棵树外,任何n阶连通图G,如果没有4阶圈,且最大度不超过3,都有大于其阶的能量.这里,图的能量是其特征值的模的和。我们给出了更一般的定理,并陈述了两个定理。

英文摘要:

Answering some questions of Gutman, we show that, except for four specific trees, every connected graph G of order n, with no cycle of order 4 and with maximum degree at most 3, has energy greater that its order. Here, the energy of a graph is the sum of the moduli of its eigenvalues. We give more general theorems and state two conjectures.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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