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arXiv · 2610.01796

On $1$-limited and $(1,2)$-domination in cubic graphs

Goran Radić·Aleksandra Tepeh
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Abstract

A dominating set $D$ of a graph is called $1$-limited if every vertex of $D$ has at most one neighbor outside $D$, while a $(1,2)$-dominating set is a dominating set in which every vertex of the set has at least two neighbors within the set. These two notions coincide on cubic graphs. We prove that the decision problem 1-Limited Dominating Set is $\mathsf{NP}$-complete even when restricted to $2$-connected planar cubic graphs, thereby completing the known complexity results for $k$-Limited Dominating Set for all fixed positive integers $k$. We also determine the exact $1$-limited domination number of the entire Goldberg family. This provides a further infinite family of cubic graphs supporting several open conjectures and proposed bounds concerning $(1,2)$-domination and induced cycles.

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Goran Radić, Aleksandra Tepeh. 2026-10-01. On $1$-limited and $(1,2)$-domination in cubic graphs. https://arxiv.org/abs/2610.01796

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