TY - CONF ID - 11462 T1 - Calculation of Wiener index for some single-wall carbon nanohorn JF - The 2nd conference and workshop on mathematical chemistry (SCWMC 09) CY - Kahann , Iran A1 - yoosofan,A A1 - Ashrafi,A PY - 2009/04/15/ N2 - Let G be a simple graph and V(G) and E(G) be vertices and edges of G, respectively. The distance between each of the two vertecies (u,v) is defined as the minimum number of vertices which should be traversed so that they can reach each other. The Wiener index of this graph, denoted by W(G), is defined as the sum of all distances between unordered pairs of vertices[1] . A conjunction of nanocone and cylindrical carbon cluster is recognized as the single-wall carbon nanohorn (SWHN) [2]. In this article, the Wiener index of some nanohorn is calculated. ER -