Short communication, Note

Altered Wiener Indices of Thorn Trees

Damir Vukičević
Bo Zhou
Nenad Trinajstić

Abstract

Three modifications of the Wiener index W(G) of a structure G have been recently proposed: the λ-modified Wiener index,the λ-variable and the λ-altered Wiener index. (Formulas in attached fulltext) For a given positive integer k, explicit formulae are available for calculating the k-modified Wiener index and the k-variable Wiener index of a thorn tree by means of the i-modified Wiener indices and the i-variable Wiener indices, respectively, of the parent tree for integers i and k with 0 ≤ i ≤ k. It is pointed out in the present report that this is not the case of the k-altered Wiener index.

Keywords

Wiener index; altered Wiener index; modified Wiener index; variable Wiener index; thorn tree

Hrčak ID:

12869

URI

https://hrcak.srce.hr/12869

Publication date:

12.6.2007.

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