{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:23V36PAJFTSVV2EICRXIUWOQDC","short_pith_number":"pith:23V36PAJ","canonical_record":{"source":{"id":"0812.2767","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2008-12-15T11:14:19Z","cross_cats_sorted":[],"title_canon_sha256":"551154ed0ac93676fd1e094eb9e2e86ea5c0756984499dc6d937285689eeadb6","abstract_canon_sha256":"2d584d589bb96a03451de89c687b62206499b38e645ed7732d772d061bbcfa13"},"schema_version":"1.0"},"canonical_sha256":"d6ebbf3c092ce55ae888146e8a59d0189e1589b91519de5b21b56245b6c58e81","source":{"kind":"arxiv","id":"0812.2767","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0812.2767","created_at":"2026-05-18T02:15:04Z"},{"alias_kind":"arxiv_version","alias_value":"0812.2767v1","created_at":"2026-05-18T02:15:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0812.2767","created_at":"2026-05-18T02:15:04Z"},{"alias_kind":"pith_short_12","alias_value":"23V36PAJFTSV","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"23V36PAJFTSVV2EI","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"23V36PAJ","created_at":"2026-05-18T12:25:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:23V36PAJFTSVV2EICRXIUWOQDC","target":"record","payload":{"canonical_record":{"source":{"id":"0812.2767","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2008-12-15T11:14:19Z","cross_cats_sorted":[],"title_canon_sha256":"551154ed0ac93676fd1e094eb9e2e86ea5c0756984499dc6d937285689eeadb6","abstract_canon_sha256":"2d584d589bb96a03451de89c687b62206499b38e645ed7732d772d061bbcfa13"},"schema_version":"1.0"},"canonical_sha256":"d6ebbf3c092ce55ae888146e8a59d0189e1589b91519de5b21b56245b6c58e81","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:15:04.814987Z","signature_b64":"YpJbmCQBqLDP5BfYxDaeircEu6N0u+5Ye+jNmPBT32AlFBRFpvq5KaYoYZpAsttzDP7OpxmMsSuXOCovU8MzAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d6ebbf3c092ce55ae888146e8a59d0189e1589b91519de5b21b56245b6c58e81","last_reissued_at":"2026-05-18T02:15:04.814447Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:15:04.814447Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0812.2767","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":"2026-05-18T02:15:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MtGqT1Tacufw4NCTWM1hdbJeQ2/JyfufEf9bLX1EU90fXl7IG1xrAsehkxRjiJ6cUrMUJTy3JfrsRsh2En7kCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T17:31:37.292271Z"},"content_sha256":"044ea47ac9c9ed52a05fe2ceddafc303ede8761c2b102ee720eaf611e8adeed4","schema_version":"1.0","event_id":"sha256:044ea47ac9c9ed52a05fe2ceddafc303ede8761c2b102ee720eaf611e8adeed4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:23V36PAJFTSVV2EICRXIUWOQDC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the boundary of the region containing trapped surfaces","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Jos\\'e M.M. Senovilla","submitted_at":"2008-12-15T11:14:19Z","abstract_excerpt":"The boundary of the region in spacetime containing future-trapped closed surfaces is considered. In asymptotically flat spacetimes, this boundary does not need to be the event horizon nor a dynamical/trapping horizon. Some properties of this boundary and its localization are analyzed, and illustrated with examples. In particular, fully explicit future-trapped compact surfaces penetrating into flat portions of a Vaidya spacetime are presented."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0812.2767","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":"2026-05-18T02:15:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BPh4GsVZ2lHoPC4rGsHl2d/de4XmqPcSg0qtuemp+JfX1GYFjadT5UQ/KuOmLozlVwBVMmZ7EAY4j7sgb9+ECQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T17:31:37.292989Z"},"content_sha256":"ab02118292384d28fcd2ae8eaebe248e3f3b374bb0ccf7b0b46feb3d9d9ad5d4","schema_version":"1.0","event_id":"sha256:ab02118292384d28fcd2ae8eaebe248e3f3b374bb0ccf7b0b46feb3d9d9ad5d4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/23V36PAJFTSVV2EICRXIUWOQDC/bundle.json","state_url":"https://pith.science/pith/23V36PAJFTSVV2EICRXIUWOQDC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/23V36PAJFTSVV2EICRXIUWOQDC/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":"2026-06-07T17:31:37Z","links":{"resolver":"https://pith.science/pith/23V36PAJFTSVV2EICRXIUWOQDC","bundle":"https://pith.science/pith/23V36PAJFTSVV2EICRXIUWOQDC/bundle.json","state":"https://pith.science/pith/23V36PAJFTSVV2EICRXIUWOQDC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/23V36PAJFTSVV2EICRXIUWOQDC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:23V36PAJFTSVV2EICRXIUWOQDC","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":"2d584d589bb96a03451de89c687b62206499b38e645ed7732d772d061bbcfa13","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2008-12-15T11:14:19Z","title_canon_sha256":"551154ed0ac93676fd1e094eb9e2e86ea5c0756984499dc6d937285689eeadb6"},"schema_version":"1.0","source":{"id":"0812.2767","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0812.2767","created_at":"2026-05-18T02:15:04Z"},{"alias_kind":"arxiv_version","alias_value":"0812.2767v1","created_at":"2026-05-18T02:15:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0812.2767","created_at":"2026-05-18T02:15:04Z"},{"alias_kind":"pith_short_12","alias_value":"23V36PAJFTSV","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"23V36PAJFTSVV2EI","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"23V36PAJ","created_at":"2026-05-18T12:25:56Z"}],"graph_snapshots":[{"event_id":"sha256:ab02118292384d28fcd2ae8eaebe248e3f3b374bb0ccf7b0b46feb3d9d9ad5d4","target":"graph","created_at":"2026-05-18T02:15:04Z","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":"The boundary of the region in spacetime containing future-trapped closed surfaces is considered. In asymptotically flat spacetimes, this boundary does not need to be the event horizon nor a dynamical/trapping horizon. Some properties of this boundary and its localization are analyzed, and illustrated with examples. In particular, fully explicit future-trapped compact surfaces penetrating into flat portions of a Vaidya spacetime are presented.","authors_text":"Jos\\'e M.M. Senovilla","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2008-12-15T11:14:19Z","title":"On the boundary of the region containing trapped surfaces"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0812.2767","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":"sha256:044ea47ac9c9ed52a05fe2ceddafc303ede8761c2b102ee720eaf611e8adeed4","target":"record","created_at":"2026-05-18T02:15:04Z","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":"2d584d589bb96a03451de89c687b62206499b38e645ed7732d772d061bbcfa13","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2008-12-15T11:14:19Z","title_canon_sha256":"551154ed0ac93676fd1e094eb9e2e86ea5c0756984499dc6d937285689eeadb6"},"schema_version":"1.0","source":{"id":"0812.2767","kind":"arxiv","version":1}},"canonical_sha256":"d6ebbf3c092ce55ae888146e8a59d0189e1589b91519de5b21b56245b6c58e81","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d6ebbf3c092ce55ae888146e8a59d0189e1589b91519de5b21b56245b6c58e81","first_computed_at":"2026-05-18T02:15:04.814447Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:15:04.814447Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YpJbmCQBqLDP5BfYxDaeircEu6N0u+5Ye+jNmPBT32AlFBRFpvq5KaYoYZpAsttzDP7OpxmMsSuXOCovU8MzAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:15:04.814987Z","signed_message":"canonical_sha256_bytes"},"source_id":"0812.2767","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:044ea47ac9c9ed52a05fe2ceddafc303ede8761c2b102ee720eaf611e8adeed4","sha256:ab02118292384d28fcd2ae8eaebe248e3f3b374bb0ccf7b0b46feb3d9d9ad5d4"],"state_sha256":"d19febe52700b50b3f668815a1ee35c4ae0f243d92523b0982d3ff12e63b72d9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Evd236Vpnj3eaKWoP94dZOWW2cCpbGI3lIKtbigJx/00VoXplGWfmVbbj9iJunCOQTuCss1dPIZggwEmWPdVDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T17:31:37.297360Z","bundle_sha256":"c6e1eef5019ece67ee05c8d4f7a46b9be353e009fd76c0aa00e5a58ef9c9106c"}}