Second and Third Extremals of Catacondensed Hexagonal Systems with Respect to the PI Index
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Abstract:
The Padmakar-Ivan (PI) index is a Wiener-Szeged-like topological index which reflects certain structural features of organic molecules. The PI index of a graph G is the sum of all edges uv of G of the number of edges which are not equidistant from the vertices u and v. In this paper we obtain the second and third extremals of catacondensed hexagonal systems with respect to the PI index.
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Journal title
volume 1 issue Issue 1 (Special Issue on the Role of PI Index in Nanotechnology)
pages 95- 103
publication date 2010-04-01
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