{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:XTQI66W2XTHX5EBZO5FT446YDS","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":"17e7551a5705be6824cba50b604df9f2489e4c055d36601c4c1abf37df5c5d69","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2013-12-16T08:14:35Z","title_canon_sha256":"8f92060e8f2c479783751494b8a63089fecbf8b79ec255a4a81ffa6e4119247d"},"schema_version":"1.0","source":{"id":"1312.4261","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1312.4261","created_at":"2026-05-18T03:04:35Z"},{"alias_kind":"arxiv_version","alias_value":"1312.4261v1","created_at":"2026-05-18T03:04:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.4261","created_at":"2026-05-18T03:04:35Z"},{"alias_kind":"pith_short_12","alias_value":"XTQI66W2XTHX","created_at":"2026-05-18T12:28:06Z"},{"alias_kind":"pith_short_16","alias_value":"XTQI66W2XTHX5EBZ","created_at":"2026-05-18T12:28:06Z"},{"alias_kind":"pith_short_8","alias_value":"XTQI66W2","created_at":"2026-05-18T12:28:06Z"}],"graph_snapshots":[{"event_id":"sha256:ad928ce1a9cf93ffc4026c75d3d5974e0a369d50713c4d8e6297c384dbe72a9c","target":"graph","created_at":"2026-05-18T03:04:35Z","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":"In this presentation, several publicly available empiric models of the celestial pole offset (CPO) and free core nutation (FCN), included those developed by the author, are investigated and compared each other from different points of view, such as representation of the observation data, FCN parameters variation, prediction accuracy. Based on this study, some practical recommendations are proposed.","authors_text":"Zinovy Malkin","cross_cats":["astro-ph.EP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2013-12-16T08:14:35Z","title":"Comparison of CPO and FCN empirical models"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.4261","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:a251aecb43fa7125362a51dbcecf3bc3065dc63a65bea1f1f34ab7a1b274c71d","target":"record","created_at":"2026-05-18T03:04:35Z","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":"17e7551a5705be6824cba50b604df9f2489e4c055d36601c4c1abf37df5c5d69","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2013-12-16T08:14:35Z","title_canon_sha256":"8f92060e8f2c479783751494b8a63089fecbf8b79ec255a4a81ffa6e4119247d"},"schema_version":"1.0","source":{"id":"1312.4261","kind":"arxiv","version":1}},"canonical_sha256":"bce08f7adabccf7e9039774b3e73d81cb9ffb9ace71876d3639f620f70afc03f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bce08f7adabccf7e9039774b3e73d81cb9ffb9ace71876d3639f620f70afc03f","first_computed_at":"2026-05-18T03:04:35.076960Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:04:35.076960Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1bkVYvZYhug7RnRHbDZsNhv7srcp4ERvWMIwnhmtCDY40PU5GMbtO8nufC620Rwkue7Y3D0NLbAs585qpuAjCg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:04:35.077880Z","signed_message":"canonical_sha256_bytes"},"source_id":"1312.4261","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a251aecb43fa7125362a51dbcecf3bc3065dc63a65bea1f1f34ab7a1b274c71d","sha256:ad928ce1a9cf93ffc4026c75d3d5974e0a369d50713c4d8e6297c384dbe72a9c"],"state_sha256":"bb6b2558984432a0d2fd4b24d868d3d20130a5543678dcd0f39839882ff736e2"}