Volume 1 (2019)

 

Research Articles

 

Leaf-induced Subtrees of Leaf-Fibonacci Trees          
Audace A. V. Dossou-Olory
 
Pages: 1-7   

On Pseudo Walk Matrices
Alexander Farrugia   
Pages: 8-15

On the Generalization of Harmonic Graphs                    
Tamás Réti, Ágota Drégelyi-Kiss 
Pages: 16-20                                                                                   

Two Upper Bounds on the Weighted Harary Indices  
Azor Emanuel, Tomislav Došlić, Akbar Ali                         
Pages: 21-25

Border and Tangent Cells in Bargraphs
Toufik Mansour
Pages: 26-29 

Some New Upper Bounds for the Hyper-Zagreb Index
Emina Milovanović, Marjan Matejić, Igor Milovanović
Pages: 30-35 

The Distance Spectrum of the Subdivision Vertex Join and Subdivision Edge Join of Two Regular Graphs
Gopalapilla Indulal, Deena C. Scaria, Xiaogang Liu
Pages: 36-41 

On the Extremal Graphs with Respect to the Variable Sum Exdeg Index
Darko Dimitrov, Akbar Ali
Pages: 42-48

On the Beta-Number and Gamma-Number of Galaxies
Rikio Ichishima, Francesc A. Muntaner-Batle, Akito Oshima
Pages: 49-53

The Hyper-Zagreb Index and Some Hamiltonian Properties of Graphs
Rao Li
Pages: 54-58

 

Review Article

 

Recent Lower Bounds for Geometric-Arithmetic Index
Ana Portilla, José M. Rodríguez, José M. Sigarreta
Pages: 59-82

 

Autobiographical Notes

 

Gary Chartrand, Professor Emeritus of Mathematics, Western Michigan University, Kalamazoo, MI 49008-5248, USA
Pages: 83-92