{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:VUCPHE7XKI2OKG7G3LUVEDA2JY","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":"a5db6ae8df39baac8d4bb4ca77a490efb4b129fb4f183a6fdf01eb2f8ac0e650","cross_cats_sorted":["quant-ph"],"license":"","primary_cat":"gr-qc","submitted_at":"2002-02-08T20:31:57Z","title_canon_sha256":"59b1de0c5e6f24288f7c8bef65091774a442b9641620a7a6013512f73d65074b"},"schema_version":"1.0","source":{"id":"gr-qc/0202031","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"gr-qc/0202031","created_at":"2026-07-04T16:33:35Z"},{"alias_kind":"arxiv_version","alias_value":"gr-qc/0202031v4","created_at":"2026-07-04T16:33:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.gr-qc/0202031","created_at":"2026-07-04T16:33:35Z"},{"alias_kind":"pith_short_12","alias_value":"VUCPHE7XKI2O","created_at":"2026-07-04T16:33:35Z"},{"alias_kind":"pith_short_16","alias_value":"VUCPHE7XKI2OKG7G","created_at":"2026-07-04T16:33:35Z"},{"alias_kind":"pith_short_8","alias_value":"VUCPHE7X","created_at":"2026-07-04T16:33:35Z"}],"graph_snapshots":[{"event_id":"sha256:d93edcb16827869456beee0ea1c1e6fbf99c4c607b4d9b7841bf385e4c42537a","target":"graph","created_at":"2026-07-04T16:33:35Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/gr-qc/0202031/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Contrary to established beliefs, spacetime may not be time-orientable. By considering an experimental test of time orientability it is shown that a failure of time-orientability of a spacetime region would be indistinguishable from a particle antiparticle annihilation event.","authors_text":"Mark J Hadley","cross_cats":["quant-ph"],"headline":"","license":"","primary_cat":"gr-qc","submitted_at":"2002-02-08T20:31:57Z","title":"The orientability of spacetime"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/0202031","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":"sha256:42f41d09c4cd463193263d8aac3d0a228e5f3b333fe1d55dacd62e4f96f15548","target":"record","created_at":"2026-07-04T16:33:35Z","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":"a5db6ae8df39baac8d4bb4ca77a490efb4b129fb4f183a6fdf01eb2f8ac0e650","cross_cats_sorted":["quant-ph"],"license":"","primary_cat":"gr-qc","submitted_at":"2002-02-08T20:31:57Z","title_canon_sha256":"59b1de0c5e6f24288f7c8bef65091774a442b9641620a7a6013512f73d65074b"},"schema_version":"1.0","source":{"id":"gr-qc/0202031","kind":"arxiv","version":4}},"canonical_sha256":"ad04f393f75234e51be6dae9520c1a4e37c556fa8a43c81ddd40cedcf9eb2113","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ad04f393f75234e51be6dae9520c1a4e37c556fa8a43c81ddd40cedcf9eb2113","first_computed_at":"2026-07-04T16:33:35.373888Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:33:35.373888Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+PWq+fCVNNQJdLRvqftzEVxvB/xyJ6bh57DsunGgvXdx+NRzqOnuSanaA9xmXnLT/hqzj9vHv9XFoUqEi9IMCQ==","signature_status":"signed_v1","signed_at":"2026-07-04T16:33:35.374237Z","signed_message":"canonical_sha256_bytes"},"source_id":"gr-qc/0202031","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:42f41d09c4cd463193263d8aac3d0a228e5f3b333fe1d55dacd62e4f96f15548","sha256:d93edcb16827869456beee0ea1c1e6fbf99c4c607b4d9b7841bf385e4c42537a"],"state_sha256":"9b7755a1876865dea89b26d48c5fdaa91d99761f595f09573de9caf668703663"}