Opuscula Math. 43, no. 6 (2023), 813-827
https://doi.org/10.7494/OpMath.2023.43.6.813
Opuscula Mathematica
On minimum intersections of certain secondary dominating sets in graphs
Anna Kosiorowska
Adrian Michalski
Iwona Włoch
Abstract. In this paper we consider secondary dominating sets, also named as \((1,k)\)-dominating sets, introduced by Hedetniemi et al. in 2008. In particular, we study intersections of the \((1,1)\)-dominating sets and proper \((1,2)\)-dominating sets. We introduce \((1,\overline{2})\)-intersection index as the minimum possible cardinality of such intersection and determine its value for some classes of graphs.
Keywords: dominating set, 2-dominating set, \((1,2)\)-dominating set, proper \((1,2)\)-dominating set, domination numbers, \((1,\overline{2})\)-intersection index.
Mathematics Subject Classification: 05C69, 05C76.
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- Anna Kosiorowska
https://orcid.org/0000-0001-6174-5266
- Rzeszow University of Technology, The Faculty of Mathematics and Applied Physics, Department of Discrete Mathematics, al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland
- Adrian Michalski (corresponding author)
https://orcid.org/0000-0002-8776-5270
- Rzeszow University of Technology, The Faculty of Mathematics and Applied Physics, Department of Discrete Mathematics, al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland
- Iwona Włoch
https://orcid.org/0000-0002-9969-0827
- Rzeszow University of Technology, The Faculty of Mathematics and Applied Physics, Department of Discrete Mathematics, al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland
- Communicated by Dalibor Fronček.
- Received: 2022-04-23.
- Revised: 2023-07-07.
- Accepted: 2023-07-07.
- Published online: 2023-07-22.