The Communications in Combinatorics and Optimization (CCO) is a peer-reviewed journal having two issues annually. The journal is devoted to advancing and promoting the theory and applications of combinatorics and optimization and interdisciplinary. It is aimed to publish original high quality refereed papers, occasionally survey articles and short notes. There are no fees for submitting, processing or publishing an article in Communications in Combinatorics and Optimization From the beginning of 2023, four issues will be published each year at the end of March, June, September, and December


News! We are delighted to announce that Communications in Combinatorics and Optimization is indexed as Web of Knowledge from 2020. 

We are delighted to announce that Communications in Combinatorics and Optimization is indexed by Scopus
From 1400 (Iranian calendar) -2021, Communications in Combinatorics and Optimization is indexed by the MSRT as an International  scientific and research journal. Congratulations to all contributors. 
Special Issue, "Selected Papers from The International Conference on Graphs, Combinatorics and Optimization (ICGCO-2022) Submit your manuscript here
Special Issue, "Selected Papers of the International Conference on Graphs, Networks and Combinatorics (ICGNC 2023)"  Submit your manuscript here
CCO is a member of  

  All submissions to CCO are checked by the iThenticate plagiarism software checker before being processed for peer review. 




Current Issue: Volume 8, Issue 2, June 2023, Pages 271-444 

New bounds on Sombor index

Pages 305-311


Ivan Gutman; Necla Kircali Gürsoy; Arif Gürsoy; Alper Ülker

A lower bound for the second Zagreb index of trees with given Roman domination number

Pages 391-396


Ayu Ameliatul Shahilah Ahmad Jamri; Fateme Movahedi; Roslan Hasni; Mohammad Hadi Akhbari

Coalition Graphs

Pages 423-430


Teresa W. Haynes; Jason T. Hedetniemi; Stephen T Hedetniemi; Alice McRae; Raghuveer Mohan