In this paper, the above mentioned irregularity measures for Mycielski constructions of any underlying graph are considered and exact formulae are derived.
📌 3 Key Takeaways
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Objective & Hypothesis:The degree-based graph invariants are parameters defined by degrees of vertices.
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Key Findings & Data:A graph is regular if all of its vertices have the same degree.
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Conclusion & Impact:In this paper, the above mentioned irregularity measures for Mycielski constructions of any underlying graph are considered and exact formulae are derived.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:: Irregularity of a graph · total irregularity of a graph · variance of the vertex degrees
Abstract
The degree-based graph invariants are parameters defined by degrees of vertices. A graph is regular if all of its vertices have the same degree. Otherwise a graph is irregular. To measure how irregular a graph is, graph topological indices were proposed including the irregularity of a graph, total irregularity of a graph, and the variance of the vertex degrees. In this paper, the above mentioned irregularity measures for Mycielski constructions of any underlying graph are considered and exact formulae are derived.
Berberler, Z. N. (2020). DEGREE-BASED INVARIANTS OF MYCIELSKI CONSTRUCTION: IRREGULARITY, TOTAL IRREGULARITY, VARIANCE. Sigma Mühendislik ve Fen Bilimleri Dergisi, Volume: 37 Issue: 3. https://ajindex.com/articles/1344928
Albertson M.O., (1997) The irregularity of a graph, Ars Combin. 46, 219–225.
Abdo H., Brandt S., Dimitrov D., (2014) The total irregularity of a graph, Discrete Math. Theor. Comput. Sci. 16(1), 201-206.
Bell F. K., (1992) A note on the irregularity of graphs, Linear Algebra Appl. 161, 45–54.
Berberler Z. N., (2019) On computing the irregularity of R-corona product types of graphs, Util. Math. to appear.
Berberler Z. N., (2019) Total Irregularity of Indu-Bala Product of Graphs, APJES 7(1), 52-55.
Criado R., Flores J., García del Amo A., Romance M., (2014) Centralities of a network and its line graph: an analytical comparison by means of their irregularity, Int. J. Comput. Math. 91(2), 304-314.
Estrada E., (2010) Randić index, irregularity and complex biomolecular networks, Acta Chim. Slov. 57, 597–603.
Hansen P., Mélot H., (2005) Variable neighborhood search for extremal graphs. 9. Bounding the irregularity of a graph, DIMACS Ser. Discrete Math. Theoret. Comput. Sci. 69, 253-264.
You L.H., Yang J.S., You Z.F., (2014) The maximal total irregularity of unicyclic graphs, Ars Comb. 114, 153–160.
You L.H., Yang J.S., Zhu Y.X., You Z.F., (2014) The maximal total irregularity of bicyclic graphs, J. Appl. Math. Article ID 785084, http://dx.doi.org/10.1155/2014/785084.
Zhu Y., You L., Yang J., (2016) The minimal total irregularity of some classes of graphs, Filomat 30(5), 1203-1211.
Dimitrov D., Škrekovski R., (2015) Comparing the irregularity and the total irregularity of graphs, Ars Math. Contemp. 9, 45–50.
Zhou B., (2008) On irregularity of graphs, Ars Combin. 88, 55-64.
Abdo H., Dimitrov D., (2014) The irregularity of graphs under graph operations, Discuss. Math. Graph Theo. 34(2), 263–278.
Abdo H., Dimitrov D., (2014) The total irregularity of graphs under graph operations, Miskolc Math. Notes 15, 3–17.
Abdo H., Dimitrov D., (2015) The Total Irregularity of Some Composite Graphs, Int. J. Comput. Appl. 122(21), 1-9.
Abdo H., Dimitrov D., Gao W., (2017) On the irregularity of some molecular structures, Can. J. Chem. 95(2), 174-183.
Abdo H., Cohen N., Dimitrov D., (2014) Graphs with maximal irregularity, Filomat 28(7), 1315-1322.
Gutman I., Hansen P., Mélot H., (2005) Variable neighborhood search for extremal graphs. 10. Comparison of irregularity indices for chemical trees, J. Chem. Inf. Model. 45, 222-230.
Henning M.A., Rautenbach D., (2007) On the irregularity of bipartite graphs, Discrete Math. 307, 1467-1472.
Albertson M.O., Berman D., (1991) Ramsey graphs without repeated degrees, Congr. Numer. 83, 91–96.
Tavakoli M., Rahbarnia F., Ashrafi A.R., (2014) Some new results on irregularity of graphs, J. Appl. Math. Inform. 32, 675-685.
Luo W., Zhou B., (2010) On the irregularity of trees and unicyclic graphs with given matching number, Util. Math. 83, 141-147.
Mycielski J., (1955) Sur le coloriage des graphs, Colloq. Math. 3, 161–162.
Gutman I., Trinajstić N., (1972) Graph theory and molecular orbitals. Total - electron energy of alternant hydrocarbons, Chem. Phys. Lett. 17, 535-538.