Energy and the Zagreb index conditions for nearly balanced bipartite graphs to be traceable

Gui-Dong Yu1, Yi Xu2, Gui-sheng Jiang3
1School of Mathematics and Computation Sciences, Anqing Normal University, Anqing 246133, China
2Basic Department, Hefei Preschool Education College, Hefei 230013
3School of Physics and Electronic Engineering, Anqing 246133, China

Abstract

The energy of a graph is defined as the sum of the absolute values of the eigenvalues of its adjacency matrix. The first Zagreb index of a graph is defined as the sum of squares of the degrees of the vertices of the graph. The second Zagreb index of a graph is defined as the sum of products of the degrees of a pairs of the adjacent vertices of the graph. In this paper, we establish some sufficient conditions for a nearly balanced bipartite graph with large minimum degree to be traceable in terms of the energy, the first Zagreb index and the second Zagreb index of the quasi-complement of the graph, respectively.

Keywords: Nearly balanced bipartite graph; Traceable; Energy; The first Zagreb index; The second Zagreb index