{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2002:QFMA55SH7JRU574BMD77GSKRVJ","short_pith_number":"pith:QFMA55SH","canonical_record":{"source":{"id":"gr-qc/0212027","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"2002-12-05T19:06:35Z","cross_cats_sorted":[],"title_canon_sha256":"1f4b531ee8b07199b9d1d03fc04fa5e0388670ad6aef4cf04ce121edabeb2275","abstract_canon_sha256":"aff80db93d4117b5cd1ee14efce3174169b343722409417335dbea8daea9e236"},"schema_version":"1.0"},"canonical_sha256":"81580ef647fa634eff8160fff34951aa463b6dd487ba9d3138a2bb492c330fc4","source":{"kind":"arxiv","id":"gr-qc/0212027","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"gr-qc/0212027","created_at":"2026-05-18T01:39:23Z"},{"alias_kind":"arxiv_version","alias_value":"gr-qc/0212027v1","created_at":"2026-05-18T01:39:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.gr-qc/0212027","created_at":"2026-05-18T01:39:23Z"},{"alias_kind":"pith_short_12","alias_value":"QFMA55SH7JRU","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_16","alias_value":"QFMA55SH7JRU574B","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_8","alias_value":"QFMA55SH","created_at":"2026-05-18T12:25:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2002:QFMA55SH7JRU574BMD77GSKRVJ","target":"record","payload":{"canonical_record":{"source":{"id":"gr-qc/0212027","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"2002-12-05T19:06:35Z","cross_cats_sorted":[],"title_canon_sha256":"1f4b531ee8b07199b9d1d03fc04fa5e0388670ad6aef4cf04ce121edabeb2275","abstract_canon_sha256":"aff80db93d4117b5cd1ee14efce3174169b343722409417335dbea8daea9e236"},"schema_version":"1.0"},"canonical_sha256":"81580ef647fa634eff8160fff34951aa463b6dd487ba9d3138a2bb492c330fc4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:39:23.429423Z","signature_b64":"BoSYFt6CjejSAPhb5PR/Hq2Al7wg0Cyn4ND0nSjy8mZ5jgkZrAWVeyhmWzh1GZ5S2ViseA512QAZ+OOVZPLiCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"81580ef647fa634eff8160fff34951aa463b6dd487ba9d3138a2bb492c330fc4","last_reissued_at":"2026-05-18T01:39:23.428781Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:39:23.428781Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"gr-qc/0212027","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":"2026-05-18T01:39:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pv7FNrn23P4KuWL1mI8LCTKE7CnOA/9qcn+MsW5ZBKccJS+d6+R7CFWaPU9elZX5NV8IuE9keC8j0uhsM93aCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T05:30:17.480933Z"},"content_sha256":"b009fdf2225d0579a06efe2c979358be1d339f53a49f939fac025d1794b2f706","schema_version":"1.0","event_id":"sha256:b009fdf2225d0579a06efe2c979358be1d339f53a49f939fac025d1794b2f706"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2002:QFMA55SH7JRU574BMD77GSKRVJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Transverse frames for Petrov type I spacetimes: a general algebraic procedure","license":"","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"David R. Matravers, Frances T. White, Marco Bruni, Virginia Re","submitted_at":"2002-12-05T19:06:35Z","abstract_excerpt":"We develop an algebraic procedure to rotate a general Newman-Penrose tetrad in a Petrov type I spacetime into a frame with Weyl scalars $\\Psi_{1}$ and $\\Psi_{3}$ equal to zero, assuming that initially all the Weyl scalars are non vanishing. The new frame highlights the physical properties of the spacetime. In particular, in a Petrov Type I spacetime, setting $\\Psi_{1}$ and $\\Psi_{3}$ to zero makes apparent the superposition of a Coulomb-type effect $\\Psi_{2}$ with transverse degrees of freedom $\\Psi_{0}$ and $\\Psi_{4}$."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/0212027","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":"2026-05-18T01:39:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/WHrvV7eKRdUGqUAWhnG5/ary6zTT2STPWB57XMWDUNJR/ImUEZGpEYJ7sH7YrFN4meDASUaMG2d+ClHTu8ABg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T05:30:17.481363Z"},"content_sha256":"b5bba16460f6e7570fce7f3438876c6a6b8a2ecaa4873d944a91628ee317ac66","schema_version":"1.0","event_id":"sha256:b5bba16460f6e7570fce7f3438876c6a6b8a2ecaa4873d944a91628ee317ac66"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QFMA55SH7JRU574BMD77GSKRVJ/bundle.json","state_url":"https://pith.science/pith/QFMA55SH7JRU574BMD77GSKRVJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QFMA55SH7JRU574BMD77GSKRVJ/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":"2026-05-30T05:30:17Z","links":{"resolver":"https://pith.science/pith/QFMA55SH7JRU574BMD77GSKRVJ","bundle":"https://pith.science/pith/QFMA55SH7JRU574BMD77GSKRVJ/bundle.json","state":"https://pith.science/pith/QFMA55SH7JRU574BMD77GSKRVJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QFMA55SH7JRU574BMD77GSKRVJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:QFMA55SH7JRU574BMD77GSKRVJ","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":"aff80db93d4117b5cd1ee14efce3174169b343722409417335dbea8daea9e236","cross_cats_sorted":[],"license":"","primary_cat":"gr-qc","submitted_at":"2002-12-05T19:06:35Z","title_canon_sha256":"1f4b531ee8b07199b9d1d03fc04fa5e0388670ad6aef4cf04ce121edabeb2275"},"schema_version":"1.0","source":{"id":"gr-qc/0212027","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"gr-qc/0212027","created_at":"2026-05-18T01:39:23Z"},{"alias_kind":"arxiv_version","alias_value":"gr-qc/0212027v1","created_at":"2026-05-18T01:39:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.gr-qc/0212027","created_at":"2026-05-18T01:39:23Z"},{"alias_kind":"pith_short_12","alias_value":"QFMA55SH7JRU","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_16","alias_value":"QFMA55SH7JRU574B","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_8","alias_value":"QFMA55SH","created_at":"2026-05-18T12:25:51Z"}],"graph_snapshots":[{"event_id":"sha256:b5bba16460f6e7570fce7f3438876c6a6b8a2ecaa4873d944a91628ee317ac66","target":"graph","created_at":"2026-05-18T01:39:23Z","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 develop an algebraic procedure to rotate a general Newman-Penrose tetrad in a Petrov type I spacetime into a frame with Weyl scalars $\\Psi_{1}$ and $\\Psi_{3}$ equal to zero, assuming that initially all the Weyl scalars are non vanishing. The new frame highlights the physical properties of the spacetime. In particular, in a Petrov Type I spacetime, setting $\\Psi_{1}$ and $\\Psi_{3}$ to zero makes apparent the superposition of a Coulomb-type effect $\\Psi_{2}$ with transverse degrees of freedom $\\Psi_{0}$ and $\\Psi_{4}$.","authors_text":"David R. Matravers, Frances T. White, Marco Bruni, Virginia Re","cross_cats":[],"headline":"","license":"","primary_cat":"gr-qc","submitted_at":"2002-12-05T19:06:35Z","title":"Transverse frames for Petrov type I spacetimes: a general algebraic procedure"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/0212027","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:b009fdf2225d0579a06efe2c979358be1d339f53a49f939fac025d1794b2f706","target":"record","created_at":"2026-05-18T01:39:23Z","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":"aff80db93d4117b5cd1ee14efce3174169b343722409417335dbea8daea9e236","cross_cats_sorted":[],"license":"","primary_cat":"gr-qc","submitted_at":"2002-12-05T19:06:35Z","title_canon_sha256":"1f4b531ee8b07199b9d1d03fc04fa5e0388670ad6aef4cf04ce121edabeb2275"},"schema_version":"1.0","source":{"id":"gr-qc/0212027","kind":"arxiv","version":1}},"canonical_sha256":"81580ef647fa634eff8160fff34951aa463b6dd487ba9d3138a2bb492c330fc4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"81580ef647fa634eff8160fff34951aa463b6dd487ba9d3138a2bb492c330fc4","first_computed_at":"2026-05-18T01:39:23.428781Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:39:23.428781Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BoSYFt6CjejSAPhb5PR/Hq2Al7wg0Cyn4ND0nSjy8mZ5jgkZrAWVeyhmWzh1GZ5S2ViseA512QAZ+OOVZPLiCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:39:23.429423Z","signed_message":"canonical_sha256_bytes"},"source_id":"gr-qc/0212027","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b009fdf2225d0579a06efe2c979358be1d339f53a49f939fac025d1794b2f706","sha256:b5bba16460f6e7570fce7f3438876c6a6b8a2ecaa4873d944a91628ee317ac66"],"state_sha256":"f3c2f4bbcd62e8ddf40c1e7585a033dfbd7ce07d377ad8e37149c0b878d1029f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NXlH+x8hd/Qwo/BjvBrssgflKRNreKk6Ab2m3uq7LPtuaMHI3F3uH7bnrbsfWA0qroZ+6ZG3jJtFK3zR0S3YAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T05:30:17.483827Z","bundle_sha256":"d94907eeaa438d0e03051fb30135ee71ff96930fa547e7a82b8d898365e128b7"}}