Convex Hexagonal Systems and Their Topological Indices
نویسندگان
چکیده
Convex hexagonal systems (CHS) i. e., hexagonal systems with no bay regions are studied. Among CHS with a fixed number of hexagons, the species with minimal/maximal number of inlets have minimal/maximal or maximal/minimal values for a variety of vertex–degree-based topological indices. These extremal CHS are characterized. 1 Convex hexagonal systems In this paper we study a special class of hexagonal systems [1] in which there are no bay regions. These will be referred to as convex hexagonal systems and will be abbreviated by CHS. Their general form is depicted in Fig. 1. Corresponding author. Member of Centro Interdisciplinario de Lógica y Álgebra, Universidad de Los Andes, Venezuela. MATCH Communications in Mathematical and in Computer Chemistry MATCH Commun. Math. Comput. Chem. 68 (2012) 97-108
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