LOWER BOUNDS FOR THE GENERAL HARMONIC INDEX OF MOLECULAR GRAPHS
YUN GAO *
Department of Editorial, Yunnan Normal University, Kunming 650092, China.
TIANWEI XU
School of Information Science and Technology, Yunnan Normal University, Kunming 650500, China
LI LIANG
School of Information Science and Technology, Yunnan Normal University, Kunming 650500, China.
WEI GAO
School of Information Science and Technology, Yunnan Normal University, Kunming 650500, China.
*Author to whom correspondence should be addressed.
Abstract
In this paper, we obtain the lower bound for the general harmonic index of molecular graphs with 2, and the extremal molecular structure is manifested. Furthermore, we discuss the lower bound and extremal structure for triangle-free molecular graph.
Keywords: Theoretical chemistry, molecule graph, general harmonic index, triangle-free