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The and -Analogs of Zagreb Indices and Coindices of GraphsDOI: 10.1155/2012/909285 Abstract: The first and second Zagreb indices were first introduced by Gutman and Trinajstić (1972). It is reported that these indices are useful in the study of anti-inflammatory activities of certain chemical instances, and in elsewhere. Recently, the first and second Zagreb coindices, a new pair of invariants, were introduced in Došlić (2008). In this paper we introduce the and (,)-analogs of the above Zagreb indices and coindices and investigate the relationship between the enhanced versions to get a unified theory.
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