Chain hexagonal cacti: extremal with respect to the eccentric connectivity index

Authors

  • S. MORADI Arak University, Iran
  • T. DOŠLIĆ University of Zagreb,Croatia
  • Z. YARAHMADI Khorramabad Branch, Islamic Azad University, Iran
Abstract:

In this paper we present explicit formulas for the eccentric connectivity index of three classes of chain hexagonal cacti. Further, it is shown that the extremal chain hexagonal cacti with respect to the eccentric connectivity index belong to one of the considered types. Some open problems and possible directions of further research are mentioned in the concluding section.

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Journal title

volume 4  issue 1

pages  123- 136

publication date 2013-03-01

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