{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:2Y6YX7735HYLH65SUDLFP2GREZ","short_pith_number":"pith:2Y6YX773","schema_version":"1.0","canonical_sha256":"d63d8bfffbe9f0b3fbb2a0d657e8d12641eb9a31215ea43920196d470e781baa","source":{"kind":"arxiv","id":"1602.01366","version":2},"attestation_state":"computed","paper":{"title":"Semantic Acyclicity Under Constraints","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.LO"],"primary_cat":"cs.DB","authors_text":"Andreas Pieris, Georg Gottlob, Pablo Barcelo","submitted_at":"2016-02-03T17:01:36Z","abstract_excerpt":"A conjunctive query (CQ) is semantically acyclic if it is equivalent to an acyclic one. Semantic acyclicity has been studied in the constraint-free case, and deciding whether a query enjoys this property is NP-complete. However, in case the database is subject to constraints such as tuple-generating dependencies (tgds) that can express, e.g., inclusion dependencies, or equality-generating dependencies (egds) that capture, e.g., functional dependencies, a CQ may turn out to be semantically acyclic under the constraints while not semantically acyclic in general. This opens avenues to new query o"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1602.01366","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DB","submitted_at":"2016-02-03T17:01:36Z","cross_cats_sorted":["cs.LO"],"title_canon_sha256":"9b40a7f0e01f1dde99fe99d3887ad9e31d7dfd56acbb7e83e68eddb650d381aa","abstract_canon_sha256":"6b4aa3ff1e62da41ca61f46173eb37ab75fee4aa4aa19bf0b3e4ad397283e949"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:12:59.614509Z","signature_b64":"kDXAT1i41owiTIO+WOE6W9NYgJPTlgR/rbsyTQK6ZaWpvPAO0UjNLFPm270qcGkaKOo8TcpH9zSZ31sSa0v9BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d63d8bfffbe9f0b3fbb2a0d657e8d12641eb9a31215ea43920196d470e781baa","last_reissued_at":"2026-05-18T01:12:59.614088Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:12:59.614088Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Semantic Acyclicity Under Constraints","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.LO"],"primary_cat":"cs.DB","authors_text":"Andreas Pieris, Georg Gottlob, Pablo Barcelo","submitted_at":"2016-02-03T17:01:36Z","abstract_excerpt":"A conjunctive query (CQ) is semantically acyclic if it is equivalent to an acyclic one. Semantic acyclicity has been studied in the constraint-free case, and deciding whether a query enjoys this property is NP-complete. However, in case the database is subject to constraints such as tuple-generating dependencies (tgds) that can express, e.g., inclusion dependencies, or equality-generating dependencies (egds) that capture, e.g., functional dependencies, a CQ may turn out to be semantically acyclic under the constraints while not semantically acyclic in general. This opens avenues to new query o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.01366","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1602.01366","created_at":"2026-05-18T01:12:59.614151+00:00"},{"alias_kind":"arxiv_version","alias_value":"1602.01366v2","created_at":"2026-05-18T01:12:59.614151+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.01366","created_at":"2026-05-18T01:12:59.614151+00:00"},{"alias_kind":"pith_short_12","alias_value":"2Y6YX7735HYL","created_at":"2026-05-18T12:29:55.572404+00:00"},{"alias_kind":"pith_short_16","alias_value":"2Y6YX7735HYLH65S","created_at":"2026-05-18T12:29:55.572404+00:00"},{"alias_kind":"pith_short_8","alias_value":"2Y6YX773","created_at":"2026-05-18T12:29:55.572404+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/2Y6YX7735HYLH65SUDLFP2GREZ","json":"https://pith.science/pith/2Y6YX7735HYLH65SUDLFP2GREZ.json","graph_json":"https://pith.science/api/pith-number/2Y6YX7735HYLH65SUDLFP2GREZ/graph.json","events_json":"https://pith.science/api/pith-number/2Y6YX7735HYLH65SUDLFP2GREZ/events.json","paper":"https://pith.science/paper/2Y6YX773"},"agent_actions":{"view_html":"https://pith.science/pith/2Y6YX7735HYLH65SUDLFP2GREZ","download_json":"https://pith.science/pith/2Y6YX7735HYLH65SUDLFP2GREZ.json","view_paper":"https://pith.science/paper/2Y6YX773","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1602.01366&json=true","fetch_graph":"https://pith.science/api/pith-number/2Y6YX7735HYLH65SUDLFP2GREZ/graph.json","fetch_events":"https://pith.science/api/pith-number/2Y6YX7735HYLH65SUDLFP2GREZ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/2Y6YX7735HYLH65SUDLFP2GREZ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/2Y6YX7735HYLH65SUDLFP2GREZ/action/storage_attestation","attest_author":"https://pith.science/pith/2Y6YX7735HYLH65SUDLFP2GREZ/action/author_attestation","sign_citation":"https://pith.science/pith/2Y6YX7735HYLH65SUDLFP2GREZ/action/citation_signature","submit_replication":"https://pith.science/pith/2Y6YX7735HYLH65SUDLFP2GREZ/action/replication_record"}},"created_at":"2026-05-18T01:12:59.614151+00:00","updated_at":"2026-05-18T01:12:59.614151+00:00"}