{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2003:O2H3S3DOCPD7O6TUKG5EZ3HSGE","short_pith_number":"pith:O2H3S3DO","canonical_record":{"source":{"id":"gr-qc/0304076","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"2003-04-22T08:54:15Z","cross_cats_sorted":[],"title_canon_sha256":"3cd5df47f66783e14f677e9edddefe65a02c1658001a9a28477c706ccfa4df6e","abstract_canon_sha256":"43848cb16cda8e7ec60da53d3ebfb1cdee381c81d2f40c150ba2aa3da9991e19"},"schema_version":"1.0"},"canonical_sha256":"768fb96c6e13c7f77a7451ba4cecf23115879c456fc0df31104a954a6f00d67a","source":{"kind":"arxiv","id":"gr-qc/0304076","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"gr-qc/0304076","created_at":"2026-05-18T01:06:47Z"},{"alias_kind":"arxiv_version","alias_value":"gr-qc/0304076v2","created_at":"2026-05-18T01:06:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.gr-qc/0304076","created_at":"2026-05-18T01:06:47Z"},{"alias_kind":"pith_short_12","alias_value":"O2H3S3DOCPD7","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"O2H3S3DOCPD7O6TU","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"O2H3S3DO","created_at":"2026-05-18T12:25:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2003:O2H3S3DOCPD7O6TUKG5EZ3HSGE","target":"record","payload":{"canonical_record":{"source":{"id":"gr-qc/0304076","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"2003-04-22T08:54:15Z","cross_cats_sorted":[],"title_canon_sha256":"3cd5df47f66783e14f677e9edddefe65a02c1658001a9a28477c706ccfa4df6e","abstract_canon_sha256":"43848cb16cda8e7ec60da53d3ebfb1cdee381c81d2f40c150ba2aa3da9991e19"},"schema_version":"1.0"},"canonical_sha256":"768fb96c6e13c7f77a7451ba4cecf23115879c456fc0df31104a954a6f00d67a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:06:47.461353Z","signature_b64":"SAYQDTnIlRv8xSpl2ZLDAAaML1QgpCStoRNacXJG1L0zUn0uoeVSJnqvvpw/2NMqYbNKgr/vL7yehfWzvNzgBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"768fb96c6e13c7f77a7451ba4cecf23115879c456fc0df31104a954a6f00d67a","last_reissued_at":"2026-05-18T01:06:47.460853Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:06:47.460853Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"gr-qc/0304076","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:06:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8yUdF6QIZaFYcLOd7AA8Nyux7cBqGTEBmu+NCyEYT4RXyviJuUvNN3kvhui6QI64SdO5TP4oL8CdleAyFyQBDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T09:31:58.902166Z"},"content_sha256":"244debe2bf0a9097d5f2355fde20a80b23ee5fb81703a289b185e14406167496","schema_version":"1.0","event_id":"sha256:244debe2bf0a9097d5f2355fde20a80b23ee5fb81703a289b185e14406167496"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2003:O2H3S3DOCPD7O6TUKG5EZ3HSGE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"High Speed Dynamics of Collapsing Cylindrical Dust Fluid","license":"","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Ken-ichi Nakao, Yoshiyuki Morisawa","submitted_at":"2003-04-22T08:54:15Z","abstract_excerpt":"We construct approximate solutions that will describe the last stage of cylindrically symmetric gravitational collapse of dust fluid. Just before the spacetime singularity formation, the speed of the dust fluid might be almost equal to the speed of light by gravitational acceleration. Therefore the analytic solution describing the dynamics of cylindrical null dust might be the crudest approximate solution of the last stage of the gravitational collapse. In this paper, we regard this null dust solution as a background and perform `high-speed approximation' to know the gravitational collapse of "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/0304076","kind":"arxiv","version":2},"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":"2026-05-18T01:06:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IjnTb8dJJQxrzxHwzApQwjajhEVdVv+jOCZjNDa4e8IeeQSQYLM7hC32AO9cCi65T8UyLlzUekjCmUC6wgIqAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T09:31:58.902831Z"},"content_sha256":"72b45aca6abdd69257f475478a653710aa13b5f55fe0e618743060558e56b1ee","schema_version":"1.0","event_id":"sha256:72b45aca6abdd69257f475478a653710aa13b5f55fe0e618743060558e56b1ee"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/O2H3S3DOCPD7O6TUKG5EZ3HSGE/bundle.json","state_url":"https://pith.science/pith/O2H3S3DOCPD7O6TUKG5EZ3HSGE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/O2H3S3DOCPD7O6TUKG5EZ3HSGE/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":"2026-05-26T09:31:58Z","links":{"resolver":"https://pith.science/pith/O2H3S3DOCPD7O6TUKG5EZ3HSGE","bundle":"https://pith.science/pith/O2H3S3DOCPD7O6TUKG5EZ3HSGE/bundle.json","state":"https://pith.science/pith/O2H3S3DOCPD7O6TUKG5EZ3HSGE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/O2H3S3DOCPD7O6TUKG5EZ3HSGE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2003:O2H3S3DOCPD7O6TUKG5EZ3HSGE","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":"43848cb16cda8e7ec60da53d3ebfb1cdee381c81d2f40c150ba2aa3da9991e19","cross_cats_sorted":[],"license":"","primary_cat":"gr-qc","submitted_at":"2003-04-22T08:54:15Z","title_canon_sha256":"3cd5df47f66783e14f677e9edddefe65a02c1658001a9a28477c706ccfa4df6e"},"schema_version":"1.0","source":{"id":"gr-qc/0304076","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"gr-qc/0304076","created_at":"2026-05-18T01:06:47Z"},{"alias_kind":"arxiv_version","alias_value":"gr-qc/0304076v2","created_at":"2026-05-18T01:06:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.gr-qc/0304076","created_at":"2026-05-18T01:06:47Z"},{"alias_kind":"pith_short_12","alias_value":"O2H3S3DOCPD7","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"O2H3S3DOCPD7O6TU","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"O2H3S3DO","created_at":"2026-05-18T12:25:52Z"}],"graph_snapshots":[{"event_id":"sha256:72b45aca6abdd69257f475478a653710aa13b5f55fe0e618743060558e56b1ee","target":"graph","created_at":"2026-05-18T01:06:47Z","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 construct approximate solutions that will describe the last stage of cylindrically symmetric gravitational collapse of dust fluid. Just before the spacetime singularity formation, the speed of the dust fluid might be almost equal to the speed of light by gravitational acceleration. Therefore the analytic solution describing the dynamics of cylindrical null dust might be the crudest approximate solution of the last stage of the gravitational collapse. In this paper, we regard this null dust solution as a background and perform `high-speed approximation' to know the gravitational collapse of ","authors_text":"Ken-ichi Nakao, Yoshiyuki Morisawa","cross_cats":[],"headline":"","license":"","primary_cat":"gr-qc","submitted_at":"2003-04-22T08:54:15Z","title":"High Speed Dynamics of Collapsing Cylindrical Dust Fluid"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/0304076","kind":"arxiv","version":2},"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":"sha256:244debe2bf0a9097d5f2355fde20a80b23ee5fb81703a289b185e14406167496","target":"record","created_at":"2026-05-18T01:06:47Z","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":"43848cb16cda8e7ec60da53d3ebfb1cdee381c81d2f40c150ba2aa3da9991e19","cross_cats_sorted":[],"license":"","primary_cat":"gr-qc","submitted_at":"2003-04-22T08:54:15Z","title_canon_sha256":"3cd5df47f66783e14f677e9edddefe65a02c1658001a9a28477c706ccfa4df6e"},"schema_version":"1.0","source":{"id":"gr-qc/0304076","kind":"arxiv","version":2}},"canonical_sha256":"768fb96c6e13c7f77a7451ba4cecf23115879c456fc0df31104a954a6f00d67a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"768fb96c6e13c7f77a7451ba4cecf23115879c456fc0df31104a954a6f00d67a","first_computed_at":"2026-05-18T01:06:47.460853Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:06:47.460853Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SAYQDTnIlRv8xSpl2ZLDAAaML1QgpCStoRNacXJG1L0zUn0uoeVSJnqvvpw/2NMqYbNKgr/vL7yehfWzvNzgBw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:06:47.461353Z","signed_message":"canonical_sha256_bytes"},"source_id":"gr-qc/0304076","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:244debe2bf0a9097d5f2355fde20a80b23ee5fb81703a289b185e14406167496","sha256:72b45aca6abdd69257f475478a653710aa13b5f55fe0e618743060558e56b1ee"],"state_sha256":"9f2a4b88e705e3c42593645e87ded4d2772f516ebccc0e2d16a8629542240155"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1YXGXFnsiMnF9nzTprbscWpBJj8aXrmdKtV1kM+aDgo3KqZ84hZWmMyu5dS1VR4vX4bDgSJV8Paashaa2qtjCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T09:31:58.907166Z","bundle_sha256":"2579cb7bb57cebb2c6d64e354dfff552cec8fd643e5a0b1a587e9adafef26ba2"}}