{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2001:VPEJHP7VX3CUU6Y7RF5I43K6TN","short_pith_number":"pith:VPEJHP7V","schema_version":"1.0","canonical_sha256":"abc893bff5bec54a7b1f897a8e6d5e9b49ddde5cbf35d222f2f4519dfbc15669","source":{"kind":"arxiv","id":"gr-qc/0107087","version":1},"attestation_state":"computed","paper":{"title":"Shell crossing in generalized Tolman-Bondi spacetimes","license":"","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Sergio M. C. V. Goncalves (Caltech)","submitted_at":"2001-07-26T22:16:42Z","abstract_excerpt":"We study the occurrence of shell crossing in spherical weakly charged dust collapse in the presence of a non-vanishing cosmological constant. We find that shell crossing always occurs from generic time-symmetric regular initial data, near the center of the matter configuration. For non-time-symmetric initial data, the occurrence---or lack thereof---of shell crossing is determined by the initial velocity profile, for a given mass and charge distribution. Physically reasonable initial data inevitably leads to shell crossing (near the center) before the minimum bounce radius is reached."},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"gr-qc/0107087","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"2001-07-26T22:16:42Z","cross_cats_sorted":[],"title_canon_sha256":"097189c6b5f2bed08f07ba1bde271bee2be41d245dca17a6b387fafa190367e8","abstract_canon_sha256":"8da4a980c81a8c2a7417f70c47bb38c5d0acc7d56177ef8b38a9ecbffccd9dd3"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:37:35.920528Z","signature_b64":"pNUFOj0+jz3+ShNNWRrjEHNYeSyWU1Cz6lZP3mXGZnJFlVbqFdbO8M366PsPSnAk4UpJ3DssR/+emWy2MremAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"abc893bff5bec54a7b1f897a8e6d5e9b49ddde5cbf35d222f2f4519dfbc15669","last_reissued_at":"2026-05-18T02:37:35.920135Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:37:35.920135Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Shell crossing in generalized Tolman-Bondi spacetimes","license":"","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Sergio M. C. V. Goncalves (Caltech)","submitted_at":"2001-07-26T22:16:42Z","abstract_excerpt":"We study the occurrence of shell crossing in spherical weakly charged dust collapse in the presence of a non-vanishing cosmological constant. We find that shell crossing always occurs from generic time-symmetric regular initial data, near the center of the matter configuration. For non-time-symmetric initial data, the occurrence---or lack thereof---of shell crossing is determined by the initial velocity profile, for a given mass and charge distribution. Physically reasonable initial data inevitably leads to shell crossing (near the center) before the minimum bounce radius is reached."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/0107087","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"gr-qc/0107087","created_at":"2026-05-18T02:37:35.920192+00:00"},{"alias_kind":"arxiv_version","alias_value":"gr-qc/0107087v1","created_at":"2026-05-18T02:37:35.920192+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.gr-qc/0107087","created_at":"2026-05-18T02:37:35.920192+00:00"},{"alias_kind":"pith_short_12","alias_value":"VPEJHP7VX3CU","created_at":"2026-05-18T12:25:50.845339+00:00"},{"alias_kind":"pith_short_16","alias_value":"VPEJHP7VX3CUU6Y7","created_at":"2026-05-18T12:25:50.845339+00:00"},{"alias_kind":"pith_short_8","alias_value":"VPEJHP7V","created_at":"2026-05-18T12:25:50.845339+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/VPEJHP7VX3CUU6Y7RF5I43K6TN","json":"https://pith.science/pith/VPEJHP7VX3CUU6Y7RF5I43K6TN.json","graph_json":"https://pith.science/api/pith-number/VPEJHP7VX3CUU6Y7RF5I43K6TN/graph.json","events_json":"https://pith.science/api/pith-number/VPEJHP7VX3CUU6Y7RF5I43K6TN/events.json","paper":"https://pith.science/paper/VPEJHP7V"},"agent_actions":{"view_html":"https://pith.science/pith/VPEJHP7VX3CUU6Y7RF5I43K6TN","download_json":"https://pith.science/pith/VPEJHP7VX3CUU6Y7RF5I43K6TN.json","view_paper":"https://pith.science/paper/VPEJHP7V","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=gr-qc/0107087&json=true","fetch_graph":"https://pith.science/api/pith-number/VPEJHP7VX3CUU6Y7RF5I43K6TN/graph.json","fetch_events":"https://pith.science/api/pith-number/VPEJHP7VX3CUU6Y7RF5I43K6TN/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/VPEJHP7VX3CUU6Y7RF5I43K6TN/action/timestamp_anchor","attest_storage":"https://pith.science/pith/VPEJHP7VX3CUU6Y7RF5I43K6TN/action/storage_attestation","attest_author":"https://pith.science/pith/VPEJHP7VX3CUU6Y7RF5I43K6TN/action/author_attestation","sign_citation":"https://pith.science/pith/VPEJHP7VX3CUU6Y7RF5I43K6TN/action/citation_signature","submit_replication":"https://pith.science/pith/VPEJHP7VX3CUU6Y7RF5I43K6TN/action/replication_record"}},"created_at":"2026-05-18T02:37:35.920192+00:00","updated_at":"2026-05-18T02:37:35.920192+00:00"}