| 一类新的直径为4的整树 |
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| 引用本文： | 徐大申. 一类新的直径为4的整树[J]. 河北大学学报(自然科学版), 1997, 0(1) |
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| 作者姓名： | 徐大申 |
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| 作者单位： | 青海大学基础部 |
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| 摘 要： | 本文给出了ｒ为偶数，直径为４的树Ｓ（ｒ，ｍｉ）为整树的一个充分条件。由此得到了ｒ为偶数直径为４的整树Ｓ（ｒ，ｍｉ）的一些新类，给出了它们的谱。同时表明这类整树有无穷多个。从而解决了文［４］中提出的有关直径为４整树的一个问题
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| 关 键 词： | 直径 整树 偶数 谱 |
Some New Classes of the Integral Trees with Diameter |
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| Xu Dashen. Some New Classes of the Integral Trees with Diameter[J]. Journal of Hebei University (Natural Science Edition), 1997, 0(1) |
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| Authors: | Xu Dashen |
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| Abstract: | A sufficient condition that trees S(r,m i) of diameter 4 are integral trees when r is even number is given. Some new classes of the integral trees S(r,m i) whose diameters are 4 and r is even number are obtained from this, and their spectra are presented. The results indicated that there are infinitely many such integral trees. Thus answered a question in . |
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| Keywords: | Diameter Integral tree Even number Spectrum |
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