TY - JOUR

T1 - Closed-form formulas for the Zhang-Zhang polynomials of benzenoid structures

T2 - Prolate rectangles and their generalizations

AU - Chou, Chien Pin

AU - Kang, Jin Su

AU - Witek, Henryk A.

PY - 2014/9/18

Y1 - 2014/9/18

N2 - We show that the Zhang-Zhang (ZZ) polynomial of a benzenoid obtained by fusing a parallelogram M(m,n) with an arbitrary benzenoid structure ABC can be simply computed as a product of the ZZ polynomials of both fragments. It seems possible to extend this important result also to cases where both fused structures are arbitrary Kekuléan benzenoids. Formal proofs of explicit forms of the ZZ polynomials for prolate rectangles Pr(m,n) and generalized prolate rectangles Pr([m1,m2,. .,mn],n) follow as a straightforward application of the general theory, giving ZZ(Pr(m,n),x)=(1+(1+x){dot operator}m)n and ZZ(Pr([m1,m2,. .,mn],n),x)=∏k=1n(1+(1+x){dot operator}mk).

AB - We show that the Zhang-Zhang (ZZ) polynomial of a benzenoid obtained by fusing a parallelogram M(m,n) with an arbitrary benzenoid structure ABC can be simply computed as a product of the ZZ polynomials of both fragments. It seems possible to extend this important result also to cases where both fused structures are arbitrary Kekuléan benzenoids. Formal proofs of explicit forms of the ZZ polynomials for prolate rectangles Pr(m,n) and generalized prolate rectangles Pr([m1,m2,. .,mn],n) follow as a straightforward application of the general theory, giving ZZ(Pr(m,n),x)=(1+(1+x){dot operator}m)n and ZZ(Pr([m1,m2,. .,mn],n),x)=∏k=1n(1+(1+x){dot operator}mk).

KW - Clar cover

KW - Clar structure

KW - Perfect matching

KW - Zhang-Zhang polynomial

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U2 - 10.1016/j.dam.2015.06.020

DO - 10.1016/j.dam.2015.06.020

M3 - Article

AN - SCOPUS:84936806586

JO - Discrete Applied Mathematics

JF - Discrete Applied Mathematics

SN - 0166-218X

ER -