Smallest Synthetic Witnesses for Conjunctive Queries
Summary: Defines synthetic witnesses D for a self-join-free CQ Q and S; ESW in P, SSW in P when Q is head-dominant. Dichotomy: SSW poly-time for head-dominant Berge-acyclic Q; NP-hard without head-domination and for some cyclic queries; applications to test-data generation and compression. (summarized by gpt-5-nano on Feb 09 2026)
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Authors
- 1. Aryan Esmailpour (University of Illinois Chicago)
- 2. Boris Glavic (University of Illinois Chicago)
- 3. Xiao Hu (University of Waterloo)
- 4. Stavros Sintos (University of Illinois Chicago)
BibTeX Citation
@inproceedings{esmailpour_pods25,
address = {New York, NY, USA},
series = {{PODS} '25},
title = {{Smallest Synthetic Witnesses for Conjunctive Queries}},
url = {https://dl.acm.org/doi/10.1145/3725250},
doi = {10.1145/3725250},
booktitle = {Proceedings of the {ACM} {SIGMOD} Symposium on {Principles} of {Database} {Systems}},
publisher = {Association for Computing Machinery},
author = {Esmailpour, Aryan and Glavic, Boris and Hu, Xiao and Sintos, Stavros},
year = {2025}
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