Linear time algorithm for dominator chromatic number of trestled graphs

Author:

Arumugam S.1ORCID,Raja Chandrasekar K.2

Affiliation:

1. National Centre for Advanced Research in Discrete Mathematics (-CARDMATH), Kalasalingam Academy of Research and Education, Anand Nagar, Krishnankoil 626126, Tamil Nadu, India

2. Department of Mathematics, Amrita College of Engineering and Technology, Amritagiri, Erachakulam Post, Nagercoil 629902, Tamil Nadu, India

Abstract

A dominator coloring (respectively, total dominator coloring) of a graph [Formula: see text] is a proper coloring [Formula: see text] of [Formula: see text] such that each closed neighborhood (respectively, open neighborhood) of every vertex of [Formula: see text] contains a color class of [Formula: see text] The minimum number of colors required for a dominator coloring (respectively, total dominator coloring) of [Formula: see text] is called the dominator chromatic number (respectively, total dominator chromatic number) of [Formula: see text] and is denoted by [Formula: see text] (respectively, [Formula: see text]). In this paper, we prove that the dominator coloring problem and the total dominator coloring problem are solvable in linear time for trestled graphs.

Publisher

World Scientific Pub Co Pte Lt

Subject

Discrete Mathematics and Combinatorics

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