Extremal Even Polygonal Chains on Wiener Numbers. (19th October 2020)

• Record Type: Journal Article
• Authors: Cao, Yuefen; Yang, Weiling; Zhang, Fuji
• Is Part Of: Polycyclic aromatic compounds. Volume 40:Number 5(2020)
• Page Start: 1616
• Page End: 1623
• Publication Date: 2020-10-19
• Subjects: 05C35; Extremal chain -- polygonal chain -- Wiener number; Polycyclic aromatic compounds -- Periodicals; 547
• DOI: 10.1080/10406638.2019.1591465
• Languages: English
• ISSNs: 1040-6638

Abstract

Abstract: Denote by A n the set of h -polygonal chains (where h is even) with n congruent regular h -polygons ( h ≥ 6 ). For any A n ∈ A n, let W ( A n ) be the Wiener number of A n . In this paper, we show that W ( Z n 2 ) ≤ W ( A n ) ≤ W ( Z n 1 ), with the equalities on the left holding only if A n = Z n 2, and the equalities on the right holding only if A n = Z n 1, where Z n 1 and Z n 2 are extremal chains of type one and type two (their definitions are given in the main text), respectively. Thus we extend the known results of extremal benzenoid chains on Wiener number to a more general case.