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First and Second Zagreb Coindices for Chains of Cycles | ||
| AL-Rafidain Journal of Computer Sciences and Mathematics | ||
| Volume 17, Issue 1, June 2023, Pages 17-22 PDF (929.88 K) | ||
| Document Type: Research Paper | ||
| DOI: 10.33899/csmj.2023.179460 | ||
| Authors | ||
| Ammar Raad Waadallah* 1; Ahmed M. Ali2 | ||
| 1College of Computer Science and Mathematics University of Mosul Mosul, Iraq | ||
| 2College of Computer Sciences and Mathematics University of Mosul, Mosul, Iraq | ||
| Abstract | ||
| Abstract—The graphs which are used in this paper are simple, finite and undirected. The first and second Zagreb indices for every non-adjacent vertices (also called first and second Zagreb coindices) are dependent only on the non-adjacent vertices degrees which interspersed the operations of addition and multiplication, respectively, for the degrees of non-adjacent vertices. The number of the edges incident on vertex v in a graph G is called the degree of a vertex v and the two vertices u and v are non-adjacent if it’s no common edge between them. In this paper, we found the first and second Zagreb coindices of chains of even cycles and also, gave some examples. | ||
| Keywords | ||
| First Zagreb coindex; Second Zagreb conidex; Identical; Even cycle | ||
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