{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:R6JXXDKLRYJXMDFUJO6YVMBWDO","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":"116cb2202298f87b6e06a1e637442bbe558bffe573f571cd19dcd246af945f4d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.FL","submitted_at":"2014-12-02T10:12:40Z","title_canon_sha256":"70aea4c6d9559619dfc8946905b1eb71ae7c98227feff17df2116673b0ed2e94"},"schema_version":"1.0","source":{"id":"1412.0839","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.0839","created_at":"2026-05-18T02:32:21Z"},{"alias_kind":"arxiv_version","alias_value":"1412.0839v1","created_at":"2026-05-18T02:32:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.0839","created_at":"2026-05-18T02:32:21Z"},{"alias_kind":"pith_short_12","alias_value":"R6JXXDKLRYJX","created_at":"2026-05-18T12:28:46Z"},{"alias_kind":"pith_short_16","alias_value":"R6JXXDKLRYJXMDFU","created_at":"2026-05-18T12:28:46Z"},{"alias_kind":"pith_short_8","alias_value":"R6JXXDKL","created_at":"2026-05-18T12:28:46Z"}],"graph_snapshots":[{"event_id":"sha256:eb4a192d905d60f6ec79d4d925d14655c56dce5447566cfda64d65d84a131a91","target":"graph","created_at":"2026-05-18T02:32:21Z","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"},"paper":{"abstract_excerpt":"The model of tree automata with equality and disequality constraints was introduced in 2007 by Filiot, Talbot and Tison. In this paper we show that if there is at least one disequality constraint, the emptiness problem is NP-hard.","authors_text":"FEMTO-ST), INRIA Nancy - Grand Est / LORIA / LIFC), LIFL), O. Kouchnarenko (FEMTO-ST, P.-C H\\'eam (INRIA Nancy - Grand Est / LORIA / LIFC, V. Hugot (INRIA Lille - Nord Europe","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.FL","submitted_at":"2014-12-02T10:12:40Z","title":"The Emptiness Problem for Tree Automata with at Least One Disequality Constraint is NP-hard"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.0839","kind":"arxiv","version":1},"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":"sha256:433f3c467a581351b04e0d0c169bbd9696a80a1e7eb730610d74c237c6cea11c","target":"record","created_at":"2026-05-18T02:32:21Z","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":"116cb2202298f87b6e06a1e637442bbe558bffe573f571cd19dcd246af945f4d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.FL","submitted_at":"2014-12-02T10:12:40Z","title_canon_sha256":"70aea4c6d9559619dfc8946905b1eb71ae7c98227feff17df2116673b0ed2e94"},"schema_version":"1.0","source":{"id":"1412.0839","kind":"arxiv","version":1}},"canonical_sha256":"8f937b8d4b8e13760cb44bbd8ab0361b9e84038c0e6e1b203ab42f84e0fb8e9c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8f937b8d4b8e13760cb44bbd8ab0361b9e84038c0e6e1b203ab42f84e0fb8e9c","first_computed_at":"2026-05-18T02:32:21.066465Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:32:21.066465Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"08MyRtiMuNKYl+qSKCVRLRN8wRf3RzIkQqOpxv+8sV2E67v9M1Ue19ur8nEmnfSR+2fK/2WAAI3U/NJ6h9sxBA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:32:21.066852Z","signed_message":"canonical_sha256_bytes"},"source_id":"1412.0839","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:433f3c467a581351b04e0d0c169bbd9696a80a1e7eb730610d74c237c6cea11c","sha256:eb4a192d905d60f6ec79d4d925d14655c56dce5447566cfda64d65d84a131a91"],"state_sha256":"96ed9e412b2dfc802bd62d6549170805db3af3e9f4c832dbbea5877c164e2d82"}