Volume 3 (2020)

Research Articles

Proper Mean Colorings of Graphs
Gary Chartrand, James Hallas, Ping Zhang
Pages: 1-8

Controllability of Certain Real Symmetric Matrices with Application to Controllability of Graphs
Zoran Stanić
Pages: 9-13.  A note on this paper, written by the same author.

Tricyclic Graphs with the Minimum Symmetric Division Deg Index
Chang Liu, Yingui Pan, Jianping Li
Pages: 14-18

A Note on the Proper Mean Indexes of Subdivided Stars
James Hallas, Ping Zhang
Pages: 19-24

On Some Variations of the Irregularity
Ali Ghalavand, Tanveer Sohail
Pages: 25-30

Recurrences of Stirling and Lah Numbers via Second Kind Bell Polynomial
Feng Qi, Pierpaolo Natalini, Paolo E. Ricci
Pages: 31-36

On Upper Dimension of Graphs and Their Bases Sets
Shariefuddin Pirzada, Malla Aijaz, Shane P. Redmond
Pages: 37-43

The Edge-Strength of Graphs
Rikio Ichishima, Akito Oshima, Yukio Takahashi
Pages: 44-49

A Linear Time Algorithm for Embedding Chord Graphs into Certain Necklace and Windmill Graphs
T. M. Rajalaxmi, N. Parthiban, Joe Ryan, A. Arul Shantrinal, R. Sundara Rajan
Pages: 50-56

Variations on McClelland’s Bound for Graph Energy
Ivan Gutman, Slobodan Filipovski, Robert Jajcay
Pages: 57-60

A Note on a Problem of Henning and Yeo About the Transversal Number of Uniform Linear Systems Whose 2-Packing Number is Fixed
Carlos A. Alfaro, Adrián Vázquez-Ávila
Pages: 61-66

Review Article

Enumeration and Wilf-Classification of Permutations Avoiding Four Patterns of Length 4
Toufik Mansour
Pages: 67-94