{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:YECKSUO4KVU27CVOBSSC6FC76L","short_pith_number":"pith:YECKSUO4","canonical_record":{"source":{"id":"1602.01847","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-02-04T21:01:53Z","cross_cats_sorted":[],"title_canon_sha256":"7eb8a40d052f88bede9533cfbb902766ad1638b099c9c2d1f8ebf32f2e05ffd8","abstract_canon_sha256":"7afc7c9951c8a22d28bac8ffa85c31420a8554abd5be07b559f990a5d37f35b4"},"schema_version":"1.0"},"canonical_sha256":"c104a951dc5569af8aae0ca42f145ff2fb90b430fb8f029cdae0b7979149791a","source":{"kind":"arxiv","id":"1602.01847","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.01847","created_at":"2026-05-18T01:15:38Z"},{"alias_kind":"arxiv_version","alias_value":"1602.01847v1","created_at":"2026-05-18T01:15:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.01847","created_at":"2026-05-18T01:15:38Z"},{"alias_kind":"pith_short_12","alias_value":"YECKSUO4KVU2","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_16","alias_value":"YECKSUO4KVU27CVO","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_8","alias_value":"YECKSUO4","created_at":"2026-05-18T12:30:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:YECKSUO4KVU27CVOBSSC6FC76L","target":"record","payload":{"canonical_record":{"source":{"id":"1602.01847","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-02-04T21:01:53Z","cross_cats_sorted":[],"title_canon_sha256":"7eb8a40d052f88bede9533cfbb902766ad1638b099c9c2d1f8ebf32f2e05ffd8","abstract_canon_sha256":"7afc7c9951c8a22d28bac8ffa85c31420a8554abd5be07b559f990a5d37f35b4"},"schema_version":"1.0"},"canonical_sha256":"c104a951dc5569af8aae0ca42f145ff2fb90b430fb8f029cdae0b7979149791a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:15:38.306026Z","signature_b64":"/NZU1A3OXEeaUQTnMLk5rt5cYG4GXdaBzULblZwE/duAnRnFjqWTcox5k2ZplvckRVsmL+ZShhvbe+g6vhTlAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c104a951dc5569af8aae0ca42f145ff2fb90b430fb8f029cdae0b7979149791a","last_reissued_at":"2026-05-18T01:15:38.305306Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:15:38.305306Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1602.01847","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:15:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"D+qTuRBYL4mVyx2aqYgYXTk/agH4uBYkMyOeackKCHiwhkz1du4WhC+5DMZQVqj0WyvEqwLMMrAez+kfz9JrDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T16:42:12.476464Z"},"content_sha256":"6ca02db2f8cbc799bd6330e3381d5ab9504681200ba86543835ac5675c95f4bc","schema_version":"1.0","event_id":"sha256:6ca02db2f8cbc799bd6330e3381d5ab9504681200ba86543835ac5675c95f4bc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:YECKSUO4KVU27CVOBSSC6FC76L","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Prescriptions for measuring and transporting local angular momenta in general relativity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"David A. Nichols, \\'Eanna \\'E. Flanagan, Justin Vines, Leo C. Stein","submitted_at":"2016-02-04T21:01:53Z","abstract_excerpt":"For observers in curved spacetimes, elements of the dual space of the set of linearized Poincar\\'e transformations from an observer's tangent space to itself can be naturally interpreted as local linear and angular momenta. We present an operational procedure by which observers can measure such quantities using only information about the spacetime curvature at their location. When applied by observers near spacelike or null infinity in stationary, vacuum, asymptotically flat spacetimes, there is a sense in which the procedure yields the well-defined linear and angular momenta of the spacetime."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.01847","kind":"arxiv","version":1},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:15:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ICICMGBQ53O8TbnXUHtfbxZ1qcaUGzL5J/3pwOcXNs2TXhP1IN+SiAMwfIKJio+m/0eBE4Ec4nFzBStg+z7JAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T16:42:12.477171Z"},"content_sha256":"3ff1f6c2a7b2577124a53e66e975f37d7921ea976d68bc85b8c246e1e5d2cab2","schema_version":"1.0","event_id":"sha256:3ff1f6c2a7b2577124a53e66e975f37d7921ea976d68bc85b8c246e1e5d2cab2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YECKSUO4KVU27CVOBSSC6FC76L/bundle.json","state_url":"https://pith.science/pith/YECKSUO4KVU27CVOBSSC6FC76L/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YECKSUO4KVU27CVOBSSC6FC76L/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-25T16:42:12Z","links":{"resolver":"https://pith.science/pith/YECKSUO4KVU27CVOBSSC6FC76L","bundle":"https://pith.science/pith/YECKSUO4KVU27CVOBSSC6FC76L/bundle.json","state":"https://pith.science/pith/YECKSUO4KVU27CVOBSSC6FC76L/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YECKSUO4KVU27CVOBSSC6FC76L/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:YECKSUO4KVU27CVOBSSC6FC76L","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":"7afc7c9951c8a22d28bac8ffa85c31420a8554abd5be07b559f990a5d37f35b4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-02-04T21:01:53Z","title_canon_sha256":"7eb8a40d052f88bede9533cfbb902766ad1638b099c9c2d1f8ebf32f2e05ffd8"},"schema_version":"1.0","source":{"id":"1602.01847","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.01847","created_at":"2026-05-18T01:15:38Z"},{"alias_kind":"arxiv_version","alias_value":"1602.01847v1","created_at":"2026-05-18T01:15:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.01847","created_at":"2026-05-18T01:15:38Z"},{"alias_kind":"pith_short_12","alias_value":"YECKSUO4KVU2","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_16","alias_value":"YECKSUO4KVU27CVO","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_8","alias_value":"YECKSUO4","created_at":"2026-05-18T12:30:53Z"}],"graph_snapshots":[{"event_id":"sha256:3ff1f6c2a7b2577124a53e66e975f37d7921ea976d68bc85b8c246e1e5d2cab2","target":"graph","created_at":"2026-05-18T01:15:38Z","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":"For observers in curved spacetimes, elements of the dual space of the set of linearized Poincar\\'e transformations from an observer's tangent space to itself can be naturally interpreted as local linear and angular momenta. We present an operational procedure by which observers can measure such quantities using only information about the spacetime curvature at their location. When applied by observers near spacelike or null infinity in stationary, vacuum, asymptotically flat spacetimes, there is a sense in which the procedure yields the well-defined linear and angular momenta of the spacetime.","authors_text":"David A. Nichols, \\'Eanna \\'E. Flanagan, Justin Vines, Leo C. Stein","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-02-04T21:01:53Z","title":"Prescriptions for measuring and transporting local angular momenta in general relativity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.01847","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":"sha256:6ca02db2f8cbc799bd6330e3381d5ab9504681200ba86543835ac5675c95f4bc","target":"record","created_at":"2026-05-18T01:15:38Z","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":"7afc7c9951c8a22d28bac8ffa85c31420a8554abd5be07b559f990a5d37f35b4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-02-04T21:01:53Z","title_canon_sha256":"7eb8a40d052f88bede9533cfbb902766ad1638b099c9c2d1f8ebf32f2e05ffd8"},"schema_version":"1.0","source":{"id":"1602.01847","kind":"arxiv","version":1}},"canonical_sha256":"c104a951dc5569af8aae0ca42f145ff2fb90b430fb8f029cdae0b7979149791a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c104a951dc5569af8aae0ca42f145ff2fb90b430fb8f029cdae0b7979149791a","first_computed_at":"2026-05-18T01:15:38.305306Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:15:38.305306Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/NZU1A3OXEeaUQTnMLk5rt5cYG4GXdaBzULblZwE/duAnRnFjqWTcox5k2ZplvckRVsmL+ZShhvbe+g6vhTlAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:15:38.306026Z","signed_message":"canonical_sha256_bytes"},"source_id":"1602.01847","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6ca02db2f8cbc799bd6330e3381d5ab9504681200ba86543835ac5675c95f4bc","sha256:3ff1f6c2a7b2577124a53e66e975f37d7921ea976d68bc85b8c246e1e5d2cab2"],"state_sha256":"e244567f4283ef2886e985c79d7b548549aad9c836677a6d5e33b5009d411ef1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aHyNlObTUU6s853kuF3qOIYfa4NzmqQEt7IiUygPcn/vMBi6aOFy3eWHlfeU6gH3bkRf5AM1sIEId1h2XxKkBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T16:42:12.481489Z","bundle_sha256":"8874b3cc5761ef7178e6c42bcbd444fe929c4ae89704aee4a69642d17e7e2723"}}