{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:RV324H2GX5DUCJTGTUCNTWP5YP","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"c5110796c69f21be459626dcf1b76e8849515ec7ecbf43625c5be971e984bd0c","cross_cats_sorted":["cs.DM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DS","submitted_at":"2023-11-02T06:38:26Z","title_canon_sha256":"650058ddc19419f60c95cea9104b4df45bcf3cbca4715bd86cdfa3e89d0b7cb7"},"schema_version":"1.0","source":{"id":"2311.01026","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2311.01026","created_at":"2026-07-05T08:18:01Z"},{"alias_kind":"arxiv_version","alias_value":"2311.01026v4","created_at":"2026-07-05T08:18:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2311.01026","created_at":"2026-07-05T08:18:01Z"},{"alias_kind":"pith_short_12","alias_value":"RV324H2GX5DU","created_at":"2026-07-05T08:18:01Z"},{"alias_kind":"pith_short_16","alias_value":"RV324H2GX5DUCJTG","created_at":"2026-07-05T08:18:01Z"},{"alias_kind":"pith_short_8","alias_value":"RV324H2G","created_at":"2026-07-05T08:18:01Z"}],"graph_snapshots":[{"event_id":"sha256:89139c2d3e9f6551a266e18a89fe821e5a3ebc11e279f9d946ace57c5c1e55f8","target":"graph","created_at":"2026-07-05T08:18:01Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2311.01026/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The minimum directed feedback vertex set problem consists in finding the minimum set of vertices that should be removed in order to make a directed graph acyclic. This is a well-known NP-hard optimization problem with applications in various fields, such as VLSI chip design, bioinformatics and transaction processing deadlock prevention and node-weighted network design. We show a constant factor approximation for the directed feedback vertex set problem in graphs of bounded genus.","authors_text":"Hao Sun","cross_cats":["cs.DM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DS","submitted_at":"2023-11-02T06:38:26Z","title":"A Constant Factor Approximation for Directed Feedback Vertex Set in Graphs of Bounded Genus"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2311.01026","kind":"arxiv","version":4},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:b4362481a72cc9a89e6ec318775a3cf11bf21c9031b359d2455444cff4d8f6f0","target":"record","created_at":"2026-07-05T08:18:01Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"c5110796c69f21be459626dcf1b76e8849515ec7ecbf43625c5be971e984bd0c","cross_cats_sorted":["cs.DM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DS","submitted_at":"2023-11-02T06:38:26Z","title_canon_sha256":"650058ddc19419f60c95cea9104b4df45bcf3cbca4715bd86cdfa3e89d0b7cb7"},"schema_version":"1.0","source":{"id":"2311.01026","kind":"arxiv","version":4}},"canonical_sha256":"8d77ae1f46bf474126669d04d9d9fdc3e88b641f12339b922e7e6836128d16cc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8d77ae1f46bf474126669d04d9d9fdc3e88b641f12339b922e7e6836128d16cc","first_computed_at":"2026-07-05T08:18:01.511840Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:18:01.511840Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"D+mIr38Sroj6UIT/VQskeeDsP9E9xTM9oh5HhWlBO7/DlCoI7BN5htbMXBGCcFenREQP/sp05gdwaySnSMy8Bw==","signature_status":"signed_v1","signed_at":"2026-07-05T08:18:01.512336Z","signed_message":"canonical_sha256_bytes"},"source_id":"2311.01026","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b4362481a72cc9a89e6ec318775a3cf11bf21c9031b359d2455444cff4d8f6f0","sha256:89139c2d3e9f6551a266e18a89fe821e5a3ebc11e279f9d946ace57c5c1e55f8"],"state_sha256":"3b982b6f7cd03a53ee2b54d5e8d008b28e47e12ac0bedb47d1cacdc90919d64d"}