Graphs with Fourth Largest Signless-Laplacian Eigenvalue Less Than Two

Yarong Wu1, Hailiang Zhang2, Bingbing Wang3
1College of Arts and Sciences, Shanghai Maritime University, Shanghai 201306, China
2Department of Mathematics, Taizhou University, Linhai Zhejiang 317000, China
3Yinzhou Gulin Vocational High School, Ningbo Zhejiang 315177, China

Abstract

In this paper, all connected graphs with the fourth largest signless-Laplacian eigenvalue less than two are determined.