License: Creative Commons Attribution 4.0 International license (CC BY 4.0)
When quoting this document, please refer to the following
DOI: 10.4230/LIPIcs.ICALP.2023.127
URN: urn:nbn:de:0030-drops-181791
URL: http://dagstuhl.sunsite.rwth-aachen.de/volltexte/2023/18179/
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Fan, Austen Z. ; Koutris, Paraschos ; Zhao, Hangdong

The Fine-Grained Complexity of Boolean Conjunctive Queries and Sum-Product Problems

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Abstract

We study the fine-grained complexity of evaluating Boolean Conjunctive Queries and their generalization to sum-of-product problems over an arbitrary semiring. For these problems, we present a general semiring-oblivious reduction from the k-clique problem to any query structure (hypergraph). Our reduction uses the notion of embedding a graph to a hypergraph, first introduced by Marx [Dániel Marx, 2013]. As a consequence of our reduction, we can show tight conditional lower bounds for many classes of hypergraphs, including cycles, Loomis-Whitney joins, some bipartite graphs, and chordal graphs. These lower bounds have a dependence on what we call the clique embedding power of a hypergraph H, which we believe is a quantity of independent interest. We show that the clique embedding power is always less than the submodular width of the hypergraph, and present a decidable algorithm for computing it. We conclude with many open problems for future research.

BibTeX - Entry

@InProceedings{fan_et_al:LIPIcs.ICALP.2023.127,
  author =	{Fan, Austen Z. and Koutris, Paraschos and Zhao, Hangdong},
  title =	{{The Fine-Grained Complexity of Boolean Conjunctive Queries and Sum-Product Problems}},
  booktitle =	{50th International Colloquium on Automata, Languages, and Programming (ICALP 2023)},
  pages =	{127:1--127:20},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-278-5},
  ISSN =	{1868-8969},
  year =	{2023},
  volume =	{261},
  editor =	{Etessami, Kousha and Feige, Uriel and Puppis, Gabriele},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/opus/volltexte/2023/18179},
  URN =		{urn:nbn:de:0030-drops-181791},
  doi =		{10.4230/LIPIcs.ICALP.2023.127},
  annote =	{Keywords: Fine-grained complexity, conjunctive queries, semiring-oblivious reduction}
}

Keywords: Fine-grained complexity, conjunctive queries, semiring-oblivious reduction
Collection: 50th International Colloquium on Automata, Languages, and Programming (ICALP 2023)
Issue Date: 2023
Date of publication: 05.07.2023

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