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Enumerating Minimal Dominating Sets and Variants in Chordal Bipartite Graphs
Acte de colloque

Enumerating Minimal Dominating Sets and Variants in Chordal Bipartite Graphs

Emanuel Castelo, Oscar Defrain et Guilherme C. M. Gomes
Leibniz International Proceedings in Informatics (LIPIcs)
WADS 2025 - 19th International Symposium on Algorithms and Data Structures (Toronto, Canada, 11/08/2025–15/08/2025)
29/08/2025

Résumé

Polynomial delay Sequential method Chordal bipartite graphs Total dominating sets Connected dominating sets Minimal dominating sets Algorithmic enumeration
Enumerating minimal dominating sets with polynomial delay in bipartite graphs is a long-standing open problem. To date, even the subcase of chordal bipartite graphs is open, with the best known algorithm due to Golovach, Heggernes, Kanté, Kratsch, Sæther, and Villanger running in incremental-polynomial time. We improve on this result by providing a polynomial delay and space algorithm enumerating minimal dominating sets in chordal bipartite graphs. Additionally, we show that the total and connected variants admit polynomial and incremental-polynomial delay algorithms, respectively, within the same class. This provides an alternative proof of a result by Golovach et al. for total dominating sets, and answers an open question for the connected variant. Finally, we give evidence that the techniques used in this paper cannot be generalized to bipartite graphs for (total) minimal dominating sets, unless P = NP, and show that enumerating minimal connected dominating sets in bipartite graphs is harder than enumerating minimal transversals in general hypergraphs.

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