{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2012:FEU252ORZBERSREGFCELH6DHUB","short_pith_number":"pith:FEU252OR","schema_version":"1.0","canonical_sha256":"2929aee9d1c8491944862888b3f867a06733a9ef9d7ab544daec13ad76bdee11","source":{"kind":"arxiv","id":"1208.3104","version":2},"attestation_state":"computed","paper":{"title":"Some combinatorial sequences associated with context-free grammars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"math.CO","authors_text":"Shi-Mei Ma","submitted_at":"2012-08-15T12:34:03Z","abstract_excerpt":"The purpose of this paper is to show that some combinatorial sequences, such as second-order Eulerian numbers and Eulerian numbers of type $B$, can be generated by context-free grammars."},"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":"1208.3104","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.CO","submitted_at":"2012-08-15T12:34:03Z","cross_cats_sorted":[],"title_canon_sha256":"fb1c7ec2718b13f431bc18e4d5351905a4d4c8a628aee310b4c5cf02e22a8e7b","abstract_canon_sha256":"8de5d1de12f97034c8b2f1b48b4c8b5eb31c7d3007b33a5350632eb14576dff6"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:48:26.591874Z","signature_b64":"Mrr70Dej6fHEN86Nifj8//zPqGqjB98M38Xb1IgXRxmFL+Wsb3m00WVmZfETiynD5e9VgzACBer/EpebJ4lVCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2929aee9d1c8491944862888b3f867a06733a9ef9d7ab544daec13ad76bdee11","last_reissued_at":"2026-05-18T03:48:26.591395Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:48:26.591395Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Some combinatorial sequences associated with context-free grammars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"math.CO","authors_text":"Shi-Mei Ma","submitted_at":"2012-08-15T12:34:03Z","abstract_excerpt":"The purpose of this paper is to show that some combinatorial sequences, such as second-order Eulerian numbers and Eulerian numbers of type $B$, can be generated by context-free grammars."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.3104","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":"1208.3104","created_at":"2026-05-18T03:48:26.591469+00:00"},{"alias_kind":"arxiv_version","alias_value":"1208.3104v2","created_at":"2026-05-18T03:48:26.591469+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.3104","created_at":"2026-05-18T03:48:26.591469+00:00"},{"alias_kind":"pith_short_12","alias_value":"FEU252ORZBER","created_at":"2026-05-18T12:27:06.952714+00:00"},{"alias_kind":"pith_short_16","alias_value":"FEU252ORZBERSREG","created_at":"2026-05-18T12:27:06.952714+00:00"},{"alias_kind":"pith_short_8","alias_value":"FEU252OR","created_at":"2026-05-18T12:27:06.952714+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/FEU252ORZBERSREGFCELH6DHUB","json":"https://pith.science/pith/FEU252ORZBERSREGFCELH6DHUB.json","graph_json":"https://pith.science/api/pith-number/FEU252ORZBERSREGFCELH6DHUB/graph.json","events_json":"https://pith.science/api/pith-number/FEU252ORZBERSREGFCELH6DHUB/events.json","paper":"https://pith.science/paper/FEU252OR"},"agent_actions":{"view_html":"https://pith.science/pith/FEU252ORZBERSREGFCELH6DHUB","download_json":"https://pith.science/pith/FEU252ORZBERSREGFCELH6DHUB.json","view_paper":"https://pith.science/paper/FEU252OR","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1208.3104&json=true","fetch_graph":"https://pith.science/api/pith-number/FEU252ORZBERSREGFCELH6DHUB/graph.json","fetch_events":"https://pith.science/api/pith-number/FEU252ORZBERSREGFCELH6DHUB/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/FEU252ORZBERSREGFCELH6DHUB/action/timestamp_anchor","attest_storage":"https://pith.science/pith/FEU252ORZBERSREGFCELH6DHUB/action/storage_attestation","attest_author":"https://pith.science/pith/FEU252ORZBERSREGFCELH6DHUB/action/author_attestation","sign_citation":"https://pith.science/pith/FEU252ORZBERSREGFCELH6DHUB/action/citation_signature","submit_replication":"https://pith.science/pith/FEU252ORZBERSREGFCELH6DHUB/action/replication_record"}},"created_at":"2026-05-18T03:48:26.591469+00:00","updated_at":"2026-05-18T03:48:26.591469+00:00"}