{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2001:BREO6KSDLRUFH7G3SOO2MUSWET","short_pith_number":"pith:BREO6KSD","canonical_record":{"source":{"id":"gr-qc/0101085","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"2001-01-20T14:07:28Z","cross_cats_sorted":[],"title_canon_sha256":"37774576045f07413d2696a8647642b4c4de99052dc8c4dbaaea2616b2f6417f","abstract_canon_sha256":"6950069a5bbb5636eac7cdfc4bad950dc06ab3ef2cd20e0e9250ba56a9bee66c"},"schema_version":"1.0"},"canonical_sha256":"0c48ef2a435c6853fcdb939da6525624d1d21d37398a176e230b66bb84e11dd0","source":{"kind":"arxiv","id":"gr-qc/0101085","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"gr-qc/0101085","created_at":"2026-05-18T00:37:16Z"},{"alias_kind":"arxiv_version","alias_value":"gr-qc/0101085v1","created_at":"2026-05-18T00:37:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.gr-qc/0101085","created_at":"2026-05-18T00:37:16Z"},{"alias_kind":"pith_short_12","alias_value":"BREO6KSDLRUF","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"BREO6KSDLRUFH7G3","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"BREO6KSD","created_at":"2026-05-18T12:25:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2001:BREO6KSDLRUFH7G3SOO2MUSWET","target":"record","payload":{"canonical_record":{"source":{"id":"gr-qc/0101085","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"2001-01-20T14:07:28Z","cross_cats_sorted":[],"title_canon_sha256":"37774576045f07413d2696a8647642b4c4de99052dc8c4dbaaea2616b2f6417f","abstract_canon_sha256":"6950069a5bbb5636eac7cdfc4bad950dc06ab3ef2cd20e0e9250ba56a9bee66c"},"schema_version":"1.0"},"canonical_sha256":"0c48ef2a435c6853fcdb939da6525624d1d21d37398a176e230b66bb84e11dd0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:37:16.795668Z","signature_b64":"6Y+BBaJnwSyMGLGhCwjL6UY5ZGqsqdu5K6Blawq+kYK3/kY2RFFzMsWAVz7kF/B/lDmHDoNBTc/EqhBTxnJ9Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0c48ef2a435c6853fcdb939da6525624d1d21d37398a176e230b66bb84e11dd0","last_reissued_at":"2026-05-18T00:37:16.794912Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:37:16.794912Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"gr-qc/0101085","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":"2026-05-18T00:37:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LVDJAuIIzl3bxfVq6VivDx23m8FSDxQ8QByd+sVsbRsOQxJy5w6Kp4kdyi77UVY7i/4ZBAKZEAEegAOy7fEgDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T15:24:47.031856Z"},"content_sha256":"93dfd290ce83180d3cdd54ebe22631dfc8704a52acccc4d060c3832405d60fed","schema_version":"1.0","event_id":"sha256:93dfd290ce83180d3cdd54ebe22631dfc8704a52acccc4d060c3832405d60fed"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2001:BREO6KSDLRUFH7G3SOO2MUSWET","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Curvature invariants in algebraically special spacetimes","license":"","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"J. Bicak, V. Pravda","submitted_at":"2001-01-20T14:07:28Z","abstract_excerpt":"It is well known that all curvature invariants of the order zero vanish for type-III and type-N vacuum spacetimes. We briefly summarize properties of higher order curvature invariants for these spacetimes."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/0101085","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":"2026-05-18T00:37:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"P9558LHO6br53C+wMMSHK7xF0GG4pheHUVTRLHNyMqzTdfrKSLRFWSY/C5QwsovUD4JMm2F69A1EmpfQGNT3Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T15:24:47.032202Z"},"content_sha256":"bad9eaac7643cbce2adfb52e3ee150839ffa266d67c9f90021b66ad1c59715b5","schema_version":"1.0","event_id":"sha256:bad9eaac7643cbce2adfb52e3ee150839ffa266d67c9f90021b66ad1c59715b5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BREO6KSDLRUFH7G3SOO2MUSWET/bundle.json","state_url":"https://pith.science/pith/BREO6KSDLRUFH7G3SOO2MUSWET/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BREO6KSDLRUFH7G3SOO2MUSWET/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":"2026-06-25T15:24:47Z","links":{"resolver":"https://pith.science/pith/BREO6KSDLRUFH7G3SOO2MUSWET","bundle":"https://pith.science/pith/BREO6KSDLRUFH7G3SOO2MUSWET/bundle.json","state":"https://pith.science/pith/BREO6KSDLRUFH7G3SOO2MUSWET/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BREO6KSDLRUFH7G3SOO2MUSWET/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2001:BREO6KSDLRUFH7G3SOO2MUSWET","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":"6950069a5bbb5636eac7cdfc4bad950dc06ab3ef2cd20e0e9250ba56a9bee66c","cross_cats_sorted":[],"license":"","primary_cat":"gr-qc","submitted_at":"2001-01-20T14:07:28Z","title_canon_sha256":"37774576045f07413d2696a8647642b4c4de99052dc8c4dbaaea2616b2f6417f"},"schema_version":"1.0","source":{"id":"gr-qc/0101085","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"gr-qc/0101085","created_at":"2026-05-18T00:37:16Z"},{"alias_kind":"arxiv_version","alias_value":"gr-qc/0101085v1","created_at":"2026-05-18T00:37:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.gr-qc/0101085","created_at":"2026-05-18T00:37:16Z"},{"alias_kind":"pith_short_12","alias_value":"BREO6KSDLRUF","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"BREO6KSDLRUFH7G3","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"BREO6KSD","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:bad9eaac7643cbce2adfb52e3ee150839ffa266d67c9f90021b66ad1c59715b5","target":"graph","created_at":"2026-05-18T00:37:16Z","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":"It is well known that all curvature invariants of the order zero vanish for type-III and type-N vacuum spacetimes. We briefly summarize properties of higher order curvature invariants for these spacetimes.","authors_text":"J. Bicak, V. Pravda","cross_cats":[],"headline":"","license":"","primary_cat":"gr-qc","submitted_at":"2001-01-20T14:07:28Z","title":"Curvature invariants in algebraically special spacetimes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/0101085","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":"sha256:93dfd290ce83180d3cdd54ebe22631dfc8704a52acccc4d060c3832405d60fed","target":"record","created_at":"2026-05-18T00:37:16Z","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":"6950069a5bbb5636eac7cdfc4bad950dc06ab3ef2cd20e0e9250ba56a9bee66c","cross_cats_sorted":[],"license":"","primary_cat":"gr-qc","submitted_at":"2001-01-20T14:07:28Z","title_canon_sha256":"37774576045f07413d2696a8647642b4c4de99052dc8c4dbaaea2616b2f6417f"},"schema_version":"1.0","source":{"id":"gr-qc/0101085","kind":"arxiv","version":1}},"canonical_sha256":"0c48ef2a435c6853fcdb939da6525624d1d21d37398a176e230b66bb84e11dd0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0c48ef2a435c6853fcdb939da6525624d1d21d37398a176e230b66bb84e11dd0","first_computed_at":"2026-05-18T00:37:16.794912Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:37:16.794912Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6Y+BBaJnwSyMGLGhCwjL6UY5ZGqsqdu5K6Blawq+kYK3/kY2RFFzMsWAVz7kF/B/lDmHDoNBTc/EqhBTxnJ9Dw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:37:16.795668Z","signed_message":"canonical_sha256_bytes"},"source_id":"gr-qc/0101085","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:93dfd290ce83180d3cdd54ebe22631dfc8704a52acccc4d060c3832405d60fed","sha256:bad9eaac7643cbce2adfb52e3ee150839ffa266d67c9f90021b66ad1c59715b5"],"state_sha256":"67a6223e153f4e7e1546fd213fc083303f4efc751e7c847e12f64f02294b11d7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oqCEGvTtvgCFsg8Ktis7qf8Szqh6KNdDPe01KiIvaoRLwSPMeKVtn7CikhpfQCB0vKgTG2p3dVAQfCdiemvyAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-25T15:24:47.034151Z","bundle_sha256":"03e3272bd5ccc8a242cc9592e4d48a5a80575f566b209bd6a66b548917df5431"}}