The Wiener number of the hexagonal net
β Scribed by W.C. Shiu; Peter C.B. Lam
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 506 KB
- Volume
- 73
- Category
- Article
- ISSN
- 0166-218X
No coin nor oath required. For personal study only.
β¦ Synopsis
The Wiener number of a molecular graph, or more generally of a connected graph, is equal to the sum of distances between all pairs of its vertices. A graph formed by a hexagon in the centre, surrounded by n rings of hexagonal cells, is called an n-hexagonal net. It is shown that the Wiener number of an n-hexagonal net equals i( 164n5 -30n3 + n).
π SIMILAR VOLUMES
A combination of the reΓΏned ΓΏnite lattice method and transfer matrices allows a radical increase in the computer enumeration of polyominoes on the hexagonal lattice (equivalently, site clusters on the triangular lattice), pn with n hexagons. We obtain pn for n 6 35. We prove that pn = n+o(n) , obtai
The Wiener number (W) of a connected graph is the sum of distances for all pairs of vertices. As a graphical invariant, it has been found extensive application in chemistry. Considering the family of trees with n vertices and a fixed maximum vertex degree, we derive some methods that can strictly re