SecondZagrebIndex on LabeledGraph
The sum over the edges of the product of the degrees of its ends.
FindStat's St000361. The graph with no vertices gives 0.
Called as CombinatorialStat(x, "SecondZagrebIndex"). The head's page has its examples.
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FindStat St000361
The second Zagreb index of a graph.
| Object | Value |
|---|---|
([],1) | 0 |
([],2) | 0 |
([],3) | 0 |
([],4) | 0 |
([],5) | 0 |
([],6) | 0 |
([],7) | 0 |
([(0,1)],2) | 1 |
Data from FindStat, the combinatorial statistic finder; the page at findstat.org/St000361 has the rest.