Mohsen Alambardar Meybodi ; Abolfazl Poureidi - On [1,2]-Domination in Interval and Circle Graphs

dmtcs:13194 - Discrete Mathematics & Theoretical Computer Science, November 15, 2024, vol. 26:3 - https://doi.org/10.46298/dmtcs.13194
On [1,2]-Domination in Interval and Circle GraphsArticle

Authors: Mohsen Alambardar Meybodi ; Abolfazl Poureidi

    A subset S of vertices in a graph G=(V,E) is a Dominating Set if each vertex in V(G)S is adjacent to at least one vertex in S. Chellali et al. in 2013, by restricting the number of neighbors in S of a vertex outside S, introduced the concept of [1,j]-dominating set. A set DV of a graph G=(V,E) is called a [1,j]-Dominating Set of G if every vertex not in D has at least one neighbor and at most j neighbors in D. The Minimum [1,j]-Domination problem is the problem of finding the minimum [1,j]-dominating set D. Given a positive integer k and a graph G=(V,E), the [1,j]-Domination Decision problem is to decide whether G has a [1,j]-dominating set of cardinality at most k. A polynomial-time algorithm was obtained in split graphs for a constant j in contrast to the Dominating Set problem which is NP-hard for split graphs. This result motivates us to investigate the effect of restriction j on the complexity of [1,j]-domination problem on various classes of graphs. Although for j3, it has been proved that the minimum of classical domination is equal to minimum [1,j]-domination in interval graphs, the complexity of finding the minimum [1,2]-domination in interval graphs is still outstanding. In this paper, we propose a polynomial-time algorithm for computing a minimum [1,2]-dominating set on interval graphs by a dynamic programming technique. Next, on the negative side, we show that the minimum [1,2]-dominating set problem on circle graphs is NP-complete.


    Volume: vol. 26:3
    Section: Discrete Algorithms
    Published on: November 15, 2024
    Accepted on: September 19, 2024
    Submitted on: March 8, 2024
    Keywords: Computer Science - Computational Complexity,Computer Science - Data Structures and Algorithms,Mathematics - Combinatorics

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