{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:T4MEFLEHVQK4DAVF3NERGA6INE","short_pith_number":"pith:T4MEFLEH","canonical_record":{"source":{"id":"1411.4599","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2014-11-17T19:21:43Z","cross_cats_sorted":[],"title_canon_sha256":"886f5d7e5d46a8cf2fb900a93f1035da764b70fbb1f79e4b00e6e6d3c08bf119","abstract_canon_sha256":"50761a6f78620c21f1d5509be57e4694412e48dc585e14a0352466e82381a851"},"schema_version":"1.0"},"canonical_sha256":"9f1842ac87ac15c182a5db491303c86905723edff00e6e2e309b334c0652a32f","source":{"kind":"arxiv","id":"1411.4599","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1411.4599","created_at":"2026-05-18T01:12:50Z"},{"alias_kind":"arxiv_version","alias_value":"1411.4599v4","created_at":"2026-05-18T01:12:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1411.4599","created_at":"2026-05-18T01:12:50Z"},{"alias_kind":"pith_short_12","alias_value":"T4MEFLEHVQK4","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_16","alias_value":"T4MEFLEHVQK4DAVF","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_8","alias_value":"T4MEFLEH","created_at":"2026-05-18T12:28:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:T4MEFLEHVQK4DAVF3NERGA6INE","target":"record","payload":{"canonical_record":{"source":{"id":"1411.4599","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2014-11-17T19:21:43Z","cross_cats_sorted":[],"title_canon_sha256":"886f5d7e5d46a8cf2fb900a93f1035da764b70fbb1f79e4b00e6e6d3c08bf119","abstract_canon_sha256":"50761a6f78620c21f1d5509be57e4694412e48dc585e14a0352466e82381a851"},"schema_version":"1.0"},"canonical_sha256":"9f1842ac87ac15c182a5db491303c86905723edff00e6e2e309b334c0652a32f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:12:50.041468Z","signature_b64":"aaKT6s/OAup3boBgC6rW8A42o0/JxNsew9e46RULTq4MCsIdlV39wSHGCBv1dw7hnlJvHnM7zFqP093KiRWADA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9f1842ac87ac15c182a5db491303c86905723edff00e6e2e309b334c0652a32f","last_reissued_at":"2026-05-18T01:12:50.041125Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:12:50.041125Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1411.4599","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:12:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"v2wTLFS9/z5BkRnRXZgFDmRfGBIp3F6vb8OAx2sZdZlgcj+KO8wINCMcC1WzTAjA9kSPFwTK2L0Vvt3pC/19Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T21:13:59.320303Z"},"content_sha256":"bd7a660623a9eb3821bd4a10c8536a7b588a9861a8717e4e55638ad3f97f39fd","schema_version":"1.0","event_id":"sha256:bd7a660623a9eb3821bd4a10c8536a7b588a9861a8717e4e55638ad3f97f39fd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:T4MEFLEHVQK4DAVF3NERGA6INE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Observer dependence of angular momentum in general relativity and its relationship to the gravitational-wave memory effect","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"David A. Nichols, \\'Eanna \\'E. Flanagan","submitted_at":"2014-11-17T19:21:43Z","abstract_excerpt":"We define a procedure by which observers can measure a type of special-relativistic linear and angular momentum $(P^a, J^{ab})$ at a point in a curved spacetime using only the spacetime geometry in a neighborhood of that point. The method is chosen to yield the conventional results in stationary spacetimes near future null infinity.\n  We also explore the extent to which spatially separated observers can compare the values of angular momentum that they measure and find consistent results. We define a generalization of parallel transport along curves which gives a prescription for transporting v"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1411.4599","kind":"arxiv","version":4},"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":"2026-05-18T01:12:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"act3nM3UKeraEX2B9GJZOgmf+4zfIagXldZZTthbgmmrkgfGimDGRabXOPR7NGlJVrxtzMr/nm3rb2+wawPFAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T21:13:59.321047Z"},"content_sha256":"82db8e3de58c0746e2214ea11d96df83de830c383dfa0904b2f2c045a32d5731","schema_version":"1.0","event_id":"sha256:82db8e3de58c0746e2214ea11d96df83de830c383dfa0904b2f2c045a32d5731"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/T4MEFLEHVQK4DAVF3NERGA6INE/bundle.json","state_url":"https://pith.science/pith/T4MEFLEHVQK4DAVF3NERGA6INE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/T4MEFLEHVQK4DAVF3NERGA6INE/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":"2026-05-25T21:13:59Z","links":{"resolver":"https://pith.science/pith/T4MEFLEHVQK4DAVF3NERGA6INE","bundle":"https://pith.science/pith/T4MEFLEHVQK4DAVF3NERGA6INE/bundle.json","state":"https://pith.science/pith/T4MEFLEHVQK4DAVF3NERGA6INE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/T4MEFLEHVQK4DAVF3NERGA6INE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:T4MEFLEHVQK4DAVF3NERGA6INE","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":"50761a6f78620c21f1d5509be57e4694412e48dc585e14a0352466e82381a851","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2014-11-17T19:21:43Z","title_canon_sha256":"886f5d7e5d46a8cf2fb900a93f1035da764b70fbb1f79e4b00e6e6d3c08bf119"},"schema_version":"1.0","source":{"id":"1411.4599","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1411.4599","created_at":"2026-05-18T01:12:50Z"},{"alias_kind":"arxiv_version","alias_value":"1411.4599v4","created_at":"2026-05-18T01:12:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1411.4599","created_at":"2026-05-18T01:12:50Z"},{"alias_kind":"pith_short_12","alias_value":"T4MEFLEHVQK4","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_16","alias_value":"T4MEFLEHVQK4DAVF","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_8","alias_value":"T4MEFLEH","created_at":"2026-05-18T12:28:49Z"}],"graph_snapshots":[{"event_id":"sha256:82db8e3de58c0746e2214ea11d96df83de830c383dfa0904b2f2c045a32d5731","target":"graph","created_at":"2026-05-18T01:12:50Z","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":"We define a procedure by which observers can measure a type of special-relativistic linear and angular momentum $(P^a, J^{ab})$ at a point in a curved spacetime using only the spacetime geometry in a neighborhood of that point. The method is chosen to yield the conventional results in stationary spacetimes near future null infinity.\n  We also explore the extent to which spatially separated observers can compare the values of angular momentum that they measure and find consistent results. We define a generalization of parallel transport along curves which gives a prescription for transporting v","authors_text":"David A. Nichols, \\'Eanna \\'E. Flanagan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2014-11-17T19:21:43Z","title":"Observer dependence of angular momentum in general relativity and its relationship to the gravitational-wave memory effect"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1411.4599","kind":"arxiv","version":4},"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:bd7a660623a9eb3821bd4a10c8536a7b588a9861a8717e4e55638ad3f97f39fd","target":"record","created_at":"2026-05-18T01:12:50Z","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":"50761a6f78620c21f1d5509be57e4694412e48dc585e14a0352466e82381a851","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2014-11-17T19:21:43Z","title_canon_sha256":"886f5d7e5d46a8cf2fb900a93f1035da764b70fbb1f79e4b00e6e6d3c08bf119"},"schema_version":"1.0","source":{"id":"1411.4599","kind":"arxiv","version":4}},"canonical_sha256":"9f1842ac87ac15c182a5db491303c86905723edff00e6e2e309b334c0652a32f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9f1842ac87ac15c182a5db491303c86905723edff00e6e2e309b334c0652a32f","first_computed_at":"2026-05-18T01:12:50.041125Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:12:50.041125Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aaKT6s/OAup3boBgC6rW8A42o0/JxNsew9e46RULTq4MCsIdlV39wSHGCBv1dw7hnlJvHnM7zFqP093KiRWADA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:12:50.041468Z","signed_message":"canonical_sha256_bytes"},"source_id":"1411.4599","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bd7a660623a9eb3821bd4a10c8536a7b588a9861a8717e4e55638ad3f97f39fd","sha256:82db8e3de58c0746e2214ea11d96df83de830c383dfa0904b2f2c045a32d5731"],"state_sha256":"f9591636801cb32e133900912d04df8fc4f3059386ba2f5262eb32fd2746d58d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0OvnqjqMAozoZUpC4wO+K1aPn4HQYmvZu8K1+TbBr0akJbquHT71nNpxZjOQ39U+nXcWjTZAh1dHfMY0eP4cCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T21:13:59.324720Z","bundle_sha256":"36485d56e7a39c7c28ea3a7766b896793f0bfeace52fd0cd3def58f8852ff4b8"}}