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Discussiones Mathematicae Graph Theory
Article . 2025 . Peer-reviewed
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Article . 2025
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On independent coalition in graphs and independent coalition graphs

Authors: Saeid Alikhani; Davood Bakhshesh; Hamidreza Golmohammadi; Sandi Klavžar;

On independent coalition in graphs and independent coalition graphs

Abstract

Summary: An independent coalition in a graph \(G\) consists of two disjoint, independent vertex sets \(V_1\) and \(V_2\), such that neither \(V_1\) nor \(V_2\) is a dominating set, but the union \(V_1\cup V_2\) is an independent dominating set of \(G\). An independent coalition partition of \(G\) is a partition \(\{V_1, \ldots, V_k\}\) of \(V(G)\) such that for every \(i\in [k]\), either the set \(V_i\) consists of a single dominating vertex of \(G\), or \(V_i\) forms an independent coalition with some other part \(V_j\). The independent coalition number \(\operatorname{IC}(G)\) of \(G\) is the maximum order of an independent coalition of \(G\). The independent coalition graph \(\mathrm{ICG}(G,\pi)\) of \(\pi=\{V_1, \ldots, V_k\} \) (and of \(G)\) has the vertex set \(\{V_1,\ldots, V_k\} \), vertices \(V_i\) and \(V_j\) being adjacent if \(V_i\) and \(V_j\) form an independent coalition in \(G\). In this paper, a large family of graphs with \(\operatorname{IC}(G) = 0\) is described and graphs \(G\) with \(\operatorname{IC}(G)\in \{n(G), n(G)-1\}\) are characterized. Some properties of \(\mathrm{ICG}(G,\pi)\) are presented. The independent coalition graphs of paths are characterized, and the independent coalition graphs of cycles described.

Country
Slovenia
Keywords

independent set, independent coalition, Vertex subsets with special properties (dominating sets, independent sets, cliques, etc.), QA1-939, independent coalition number, dominacijska množica, neodvisna množica, neodvisna koalicija, neodvisnostno koalicijsko število, grafi neodvisnih koalicij, Structural characterization of families of graphs, dominating set, independent coalition graph, Mathematics, dominating set, independent set, independent coalition, independent coalition number, independent coalition graphs, info:eu-repo/classification/udc/519.17

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
5
Top 10%
Average
Top 10%
Green
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