{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:Z3P6MASHOOHQPEYIFIORTFFCII","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":"dd3884059077538703d194a5f1641234a2a42ef7fbf6764d55363cf47422dc8b","cross_cats_sorted":["physics.pop-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.HO","submitted_at":"2013-11-12T17:48:25Z","title_canon_sha256":"3e8ae1f26825cc283a8030795b864ce595d081d2716549d8424e10e98d4a6e26"},"schema_version":"1.0","source":{"id":"1311.2855","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.2855","created_at":"2026-05-18T03:07:21Z"},{"alias_kind":"arxiv_version","alias_value":"1311.2855v1","created_at":"2026-05-18T03:07:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.2855","created_at":"2026-05-18T03:07:21Z"},{"alias_kind":"pith_short_12","alias_value":"Z3P6MASHOOHQ","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_16","alias_value":"Z3P6MASHOOHQPEYI","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_8","alias_value":"Z3P6MASH","created_at":"2026-05-18T12:28:09Z"}],"graph_snapshots":[{"event_id":"sha256:930a23febebf1f9576b0e9b3adf3c99f3440a15e0e410929b259d81ee25f24ae","target":"graph","created_at":"2026-05-18T03:07:21Z","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":"Three versions of Luca Pacioli's 'De Dvina Proportione' remain: a manuscript held in Milan, another in Geneva and a printed version edited in Venice. A recent book, 'Antologia della Divina Proporzione', has all three in one volume, allowing an easy comparison of the different versions. The present paper proposes some observations about these drawings, generally said to be of Leonardo da Vinci's hand.","authors_text":"Dirk Huylebrouck","cross_cats":["physics.pop-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.HO","submitted_at":"2013-11-12T17:48:25Z","title":"Observations about Leonardo's drawings for Luca Pacioli"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.2855","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:d023a95050c6c799633b3aeeedfe3c8a3d2daf5b2e86a647524fb275af3a056c","target":"record","created_at":"2026-05-18T03:07:21Z","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":"dd3884059077538703d194a5f1641234a2a42ef7fbf6764d55363cf47422dc8b","cross_cats_sorted":["physics.pop-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.HO","submitted_at":"2013-11-12T17:48:25Z","title_canon_sha256":"3e8ae1f26825cc283a8030795b864ce595d081d2716549d8424e10e98d4a6e26"},"schema_version":"1.0","source":{"id":"1311.2855","kind":"arxiv","version":1}},"canonical_sha256":"cedfe60247738f0793082a1d1994a2422494f6f4f9cf055a8a574a0eeb07dfe8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cedfe60247738f0793082a1d1994a2422494f6f4f9cf055a8a574a0eeb07dfe8","first_computed_at":"2026-05-18T03:07:21.743947Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:07:21.743947Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mu4BfbM3l915BGNlthMuPUWb5gdAN4H0u27B58obYyt3bqXZHIOqe3wEj4fj8GgdqO8tAWqLEWCPRe74iPN4BA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:07:21.744533Z","signed_message":"canonical_sha256_bytes"},"source_id":"1311.2855","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d023a95050c6c799633b3aeeedfe3c8a3d2daf5b2e86a647524fb275af3a056c","sha256:930a23febebf1f9576b0e9b3adf3c99f3440a15e0e410929b259d81ee25f24ae"],"state_sha256":"f1ade328dd7afb4c67daf9d3e7bd5014806df1606fc8c6fb71224604c700b78d"}