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WIENER INVARIANTS OF PRODUCT OF GRAPHS

A topological invariant is a numerical descriptor of a molecule, based on a certain topological feature of the corresponding molecular graph. A representation of an object giving information only about the number of elements composing it and their connectivity is named as topological representation of an object. One of the most widely known topological descriptor is the Wiener invariant named after chemist Harold Wiener. The Wiener invariant [2] of a graph is defined as W (Λ) = 1 2 ∑