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The Complexity of Regular Trail and Simple Path Queries on Undirected Graphs

Summary: Separates tractable vs. hard regular-language cases for trail and simple-path queries on undirected graphs using graph-minor and group-labeled techniques. Trails are polytime for common simple-chain regexes; simple-paths polytime for a large subclass, full dichotomy remains hard (subsumes a 30-year open problem). (summarized by gpt-5-mini on Feb 09 2026)

Paper ID
1843
Venue
PODS
Year
2022
Pagerank
4.4369334e-05
Overall Rank
8,827 | 38.66%
DOI
10.1145/3517804.3524149

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Rank Citing Paper Year Venue Pagerank
8,803 Conjunctive Regular Path Queries under Injective Semantics 2023 PODS 4.4426077e-05
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