恶心
发表于 2025-3-25 07:18:07
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ineluctable
发表于 2025-3-25 10:17:06
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Lipoprotein(A)
发表于 2025-3-25 14:33:07
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通情达理
发表于 2025-3-25 18:19:29
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比目鱼
发表于 2025-3-25 21:56:23
Introduction,e number of certain trees., Some of his problems lend themselves to chemical interpretation: the number of trees in question is equal to the number of certain (theoretically possible) chemical compounds.
MARS
发表于 2025-3-26 03:09:53
Groups,d balls discussed in Sec. 2 have to be replaced by more complex objects, which we will call figures; on the other hand, the special permutation group of the octahedron rotations will have to be replaced by a more general permutation group.
Insufficient
发表于 2025-3-26 04:58:24
Graphs,xposition I provide more than the bare essentials. I begin by repeating some known definitions in graph theory. Some problems touched upon in the Introduction are going to be presented “officially” later on. I will adhere as much as possible to the terminology used by D. König in his elegant text..
fructose
发表于 2025-3-26 11:54:30
Chemical Compounds,al) formula. Conditions I and II in Sec. 29 become meaningful in chemical terms. Every edge terminating in two endpoints means that there are no free valences. The connectedness of a graph indicates that all atoms are tied together into a molecule. The number of edges ending in the same vertex corre
傻
发表于 2025-3-26 14:19:56
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Banister
发表于 2025-3-26 18:53:56
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