aggressor
发表于 2025-3-25 03:24:48
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腐蚀
发表于 2025-3-25 07:30:43
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clarify
发表于 2025-3-25 14:21:48
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incarcerate
发表于 2025-3-25 16:05:27
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令人苦恼
发表于 2025-3-25 21:58:47
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灯泡
发表于 2025-3-26 02:15:26
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哀求
发表于 2025-3-26 07:13:34
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Project
发表于 2025-3-26 12:01:45
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矛盾心理
发表于 2025-3-26 14:36:16
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生命层
发表于 2025-3-26 18:42:08
Recent results on trees,Our object is to present six theorems on trees discovered since the appearance of the book . These deal with (1) trees with hamiltonian square, (2) path numbers, (3) the tree graph of a graph, (4) the intersection graph of subtrees of a tree, (5) cospectral trees, and (6) the probability of an endpoint.