ABSTRACT
Ch( CO )-Ch(P^)-Ch(Pg)-Ch(P^)2-4 Ch(P^)-2 Substituting in the above formula the expressions for C S{Pn) previously obtained, one arrives to the final result
Details of the extensive recent work on characteristic pcfiynomials can be found elsewhere [157,183-185]. In a series of papers [186-189] Dias examined some structural invariants of the mdecular graph, related to the coefficients of the characteristic polynomial and having chemical significance. Various methods for the computation of the characteristic pdynomials of chemical graphs have been put forward [190-194]. The factorization of the characteristic pdynomials was studied by Kirby [195]. In the present moment (January 1989) it seems that the characteristic polynomial still remains the most popular among grsq>hic polynomials of mathematical chemistry.
