Main Subjects = Graph theory
Number of Articles: 91
1. A counterexample to a conjecture of Jafari Rad and Volkmann

Articles in Press, Accepted Manuscript, Available Online from 29 April 2021

10.22049/cco.2021.27226.1214

Mostafa Blidia; Mustapha Chellali


2. Algorithmic Aspects of Quasi-Total Roman Domination in Graphs

Articles in Press, Accepted Manuscript, Available Online from 30 April 2021

10.22049/cco.2021.27126.1200

Venkata Subba Reddy P; Mangal Vikas


3. A note on δ^(k)-colouring of the Cartesian product of some graphs

Articles in Press, Accepted Manuscript, Available Online from 04 May 2021

10.22049/cco.2021.27114.1211

Sudev Naduvath; Merlin Thomas Ellumkalayil


4. On the powers of signed graphs

Articles in Press, Accepted Manuscript, Available Online from 07 March 2021

10.22049/cco.2021.27083.1193

Shijin T V; Germina K A; Shahul Hameed K


5. Total outer-convex domination number of graphs

Articles in Press, Accepted Manuscript, Available Online from 12 April 2021

10.22049/cco.2021.27141.1203

Rubelyn Yangyang; Marylin Tarongoy; Evangelyn Revilla; Rona Mae Banlasan; Jonecis A Dayap


6. Þ-energy of generalized Petersen graphs

Articles in Press, Accepted Manuscript, Available Online from 26 February 2021

10.22049/cco.2021.27102.1197

Prajakta Bharat Joshi; Mayamma Joseph


7. New Bounds on the Energy of a Graph

Articles in Press, Accepted Manuscript, Available Online from 28 April 2021

10.22049/cco.2021.26999.1179

Hajar Shooshtary; Jonnathan Rodriguez


8. Weak signed Roman k-domatic number of a graph

Articles in Press, Accepted Manuscript, Available Online from 26 February 2021

10.22049/cco.2021.26998.1178

Lutz Volkmann


9. On the 2-independence subdivision number of graphs

Articles in Press, Accepted Manuscript, Available Online from 02 May 2021

10.22049/cco.2021.27060.1186

Nacéra Meddah; Mostafa Blidia; Mustapha Chellali


10. Two upper bounds on the A_α-spectral radius of a connected graph

Articles in Press, Accepted Manuscript, Available Online from 23 March 2021

10.22049/cco.2021.27061.1187

Shariefuddin Pirzada


11. Total domination in cubic Knodel graphs

Volume 6, Issue 2, Summer and Autumn 2021, Pages 221-230

10.22049/cco.2020.26793.1143

Nader Jafari Rad; Doost Ali Mojdeh; Reza Musawi; E. Nazari


12. A characterization relating domination, semitotal domination and total Roman domination in trees

Volume 6, Issue 2, Summer and Autumn 2021, Pages 197-209

10.22049/cco.2020.26892.1157

Abel Cabrera Martinez; Alondra Martinez Arias; Maikel Menendez Castillo


13. Line completion number of grid graph Pn × Pm

Volume 6, Issue 2, Summer and Autumn 2021, Pages 299-313

10.22049/cco.2021.26884.1156

Joseph Varghese Kureethara; Merin Sebastian


15. Strength of strongest dominating sets in fuzzy graphs

Volume 6, Issue 2, Summer and Autumn 2021, Pages 287-297

10.22049/cco.2021.26988.1174

Nader Jafari Rad; Marzieh Farhadi Jalalvand; Maryam Ghorani


16. Distinct edge geodetic decomposition in graphs

Volume 6, Issue 2, Summer and Autumn 2021, Pages 185-196

10.22049/cco.2020.26638.1126

J. JOHN; D. Stalin


17. On the variable sum exdeg index and cut edges of graphs

Volume 6, Issue 2, Summer and Autumn 2021, Pages 249-257

10.22049/cco.2021.26865.1152

Ansa Kanwal; Adnan Aslam; Zahid Raza; Naveed Iqbal; Bawfeh Kometa


18. Outer independent Roman domination number of trees

Volume 6, Issue 2, Summer and Autumn 2021, Pages 273-286

10.22049/cco.2021.27072.1191

Nasrin Dehgardi; M Chellali


19. Signed total Italian k-domination in graphs

Volume 6, Issue 2, Summer and Autumn 2021, Pages 171-183

10.22049/cco.2020.26919.1164

Lutz Volkmann


20. On Zagreb Energy and edge-Zagreb energy

Volume 6, Issue 1, Winter and Spring 2021, Pages 155-169

10.22049/cco.2020.26901.1160

Rakshith B R


21. On the extremal total irregularity index of n-vertex trees with fixed maximum degree

Volume 6, Issue 1, Winter and Spring 2021, Pages 113-121

10.22049/cco.2020.26965.1168

Shamaila Adeel; Akhlaq Ahmad Bhatti


22. A note on the first Zagreb index and coindex of graphs

Volume 6, Issue 1, Winter and Spring 2021, Pages 41-51

10.22049/cco.2020.26809.1144

Igor Milovanovic; Marjan Matejic; Emina Milovanovic; Rana Khoeilar


23. Twin signed total Roman domatic numbers in digraphs

Volume 6, Issue 1, Winter and Spring 2021, Pages 17-26

10.22049/cco.2020.26791.1142

Jafar Amjadi


24. Weak signed Roman k-domination in graphs

Volume 6, Issue 1, Winter and Spring 2021, Pages 1-15

10.22049/cco.2020.26734.1137

Lutz Volkmann


25. Independent domination in directed graphs

Volume 6, Issue 1, Winter and Spring 2021, Pages 67-80

10.22049/cco.2020.26845.1149

Michael Cary; Jonathan Cary; Savari Prabhu