Table 1 |
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The most commonly used topological indices. |
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Index |
Expression for calculation |
Observation |
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Wiener index |
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Di,j represents off-diagonal elements of matrix which stands for the shortest distance in term on number of bonds between atom i and j |
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Valence connectivity index |
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vi and vj are weights (valence delta values) of vertices i and j making up edge in vertex weighted graph G |
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Balaban index |
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the average distance sum connectivity; where E is the number of edges, μ is cyclomatic number of G and dsi is a distance sum |
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Information-theoretic index |
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modified Shannon's equation where n is the number of different sets of elements, Ni is the number of elements in the i-th set of elements and the sum is over all sets of elements |
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Shultz index |
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molecular topological index (MTI) is based on adjacency matrix (A), the distance matrix (D) and the valency matrix (v); the of elements ei of the row matrix v [A+D] gives Shultz index |
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Medić-Šarić et al. Nutrition Journal 2009 8:33 doi:10.1186/1475-2891-8-33 |
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