Omega polynomial revisitedDiudea, Mircea V. (Avtor) Klavžar, Sandi (Avtor) mathematicschemical graph theorycounting polynomialsOmmega polynomialTheta polynomialPi polynomialPI indexSadhana polynomialCluj-Ilmenau indexCI indexOmega polynomial was proposed by Diudea (Omega Polynomial, Carpath. J. Math., 2006, 22, 43-47) to count the opposite topologically parallel edges in graphs, particularly to describe the polyhedral nanostructures. In this paper, the main definitions are re-analyzed and clear relations with other three related polynomials are established. These relations are supported by close formulas and appropriate examples. Slovenian Chemical Society20102017-08-24 12:12:24Znanstveno delo67607ISSN: 1318-0207UDK: 519.17:54OceCobissID: 14086149COBISS_ID: 15700825ISSN pri članku: 1318-0207NUK URN: URN:SI:UM:DK:LNYPKT0Gsl