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Inverse problem for the first entire Zagreb index

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The inverse problem for topological graph indices is about the exis- tence of a graph having its index value equal to a given non-negative integer. In this paper, we study the problem for the rst entire Zagreb index. We will rst show that the rst entire Zagreb index must be even for any graph G, and can take all positive even integer values except 4; 6; 10; 12; 14; 18; 20; 22; 26; 28; 30; 36; 38 and 46.

Abstract

The inverse problem for topological graph indices is about the exis- tence of a graph having its index value equal to a given non-negative integer. In this paper, we study the problem for the rst entire Zagreb index. We will rst show that the rst entire Zagreb index must be even for any graph G, and can take all positive even integer values except 4; 6; 10; 12; 14; 18; 20; 22; 26; 28; 30; 36; 38 and 46.

참고문헌 (26)

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