3 papers
math.CO2019
Wiener index and Harary index on pancyclic graphs
Huicai Jia, Hongye Song
Wiener index and Harary index are two classic and well-known topological indices for the characterization of molecular graphs. Recently, Yu et al. \cite{YYSX} established some suff…
math.CO2019
Vertex-connectivity and -index of graphs with fixed girth
Huicai Jia, Hong-Jian Lai, Ruifang Liu +1
Let denote the -index of a graph , which is the largest signless Laplacian eigenvalue of . We prove best possible upper bounds of and best possible lower bou…
math.CO2018
A note on eigenvalues and Hamiltoinan properties of -connected graphs
Huicai Jia, Ruifang Liu, Hong-Jian Lai
Let and denote the spectral radius and the Laplacian spectral radius of a graph , respectively. Li in [Electronic J. Linear Algebra 34 (2018) 389-392] prov…