,
Dan Shlomo Mizrahi
Creative Commons Attribution 4.0 International license
Enumerating the minimal hitting sets of a hypergraph is a problem which arises in many data management applications that include constraint mining, discovering unique column combinations, and enumerating database repairs. Previously, Eiter et al. [Thomas Eiter et al., 2003] showed that the minimal hitting sets of an n-vertex hypergraph, with treewidth w, can be enumerated with delay O^*(n^w) (ignoring polynomial factors), with space requirements that scale with the output size. We improve this to fixed-parameter-linear delay, following an FPT preprocessing phase. The memory consumption of our algorithm is exponential with respect to the treewidth of the hypergraph.
@InProceedings{kenig_et_al:LIPIcs.ICDT.2025.8,
author = {Kenig, Batya and Mizrahi, Dan Shlomo},
title = {{Enumeration of Minimal Hitting Sets Parameterized by Treewidth}},
booktitle = {28th International Conference on Database Theory (ICDT 2025)},
pages = {8:1--8:20},
series = {Leibniz International Proceedings in Informatics (LIPIcs)},
ISBN = {978-3-95977-364-5},
ISSN = {1868-8969},
year = {2025},
volume = {328},
editor = {Roy, Sudeepa and Kara, Ahmet},
publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
address = {Dagstuhl, Germany},
URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2025.8},
URN = {urn:nbn:de:0030-drops-229498},
doi = {10.4230/LIPIcs.ICDT.2025.8},
annote = {Keywords: Enumeration, Hitting sets}
}