{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2004:IHYHJV2O2GFCHHKRXDOC7QNEOT","short_pith_number":"pith:IHYHJV2O","canonical_record":{"source":{"id":"astro-ph/0402311","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-02-12T19:43:23Z","cross_cats_sorted":[],"title_canon_sha256":"3370dcc0b4a6f7b377f15bc6b130f233e1213c08a869d3ab8d05b487a3a805d1","abstract_canon_sha256":"bbf48439cb2b84886510e8daf76651fa1b329293e9edd7f6856d97e177907142"},"schema_version":"1.0"},"canonical_sha256":"41f074d74ed18a239d51b8dc2fc1a474df281429b4e54004055cb29186f8363d","source":{"kind":"arxiv","id":"astro-ph/0402311","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0402311","created_at":"2026-07-04T16:43:01Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0402311v1","created_at":"2026-07-04T16:43:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0402311","created_at":"2026-07-04T16:43:01Z"},{"alias_kind":"pith_short_12","alias_value":"IHYHJV2O2GFC","created_at":"2026-07-04T16:43:01Z"},{"alias_kind":"pith_short_16","alias_value":"IHYHJV2O2GFCHHKR","created_at":"2026-07-04T16:43:01Z"},{"alias_kind":"pith_short_8","alias_value":"IHYHJV2O","created_at":"2026-07-04T16:43:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2004:IHYHJV2O2GFCHHKRXDOC7QNEOT","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0402311","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-02-12T19:43:23Z","cross_cats_sorted":[],"title_canon_sha256":"3370dcc0b4a6f7b377f15bc6b130f233e1213c08a869d3ab8d05b487a3a805d1","abstract_canon_sha256":"bbf48439cb2b84886510e8daf76651fa1b329293e9edd7f6856d97e177907142"},"schema_version":"1.0"},"canonical_sha256":"41f074d74ed18a239d51b8dc2fc1a474df281429b4e54004055cb29186f8363d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:43:01.901221Z","signature_b64":"vBgIghuwHHcuY+6ipeUxdFjmkq+AFu1p5CcV+rkqthnPbU2rHkgC07BAMrat/HnxyQv2c/7wEfzzitdv+tetAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"41f074d74ed18a239d51b8dc2fc1a474df281429b4e54004055cb29186f8363d","last_reissued_at":"2026-07-04T16:43:01.900738Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:43:01.900738Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0402311","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":"2026-07-04T16:43:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GwqL4xQfQVhAaPIQ6Ai9JcAjjmhBlfGFWQw6zPKJKkLEkPLzWka21qZ/h9nvVOBcZoJ36Zyb4eUBKYxvtaT0AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T06:07:41.361829Z"},"content_sha256":"54155f8a8137881239cc8be28c8c04689507bd6b50f455e0d1e0bde009c1d691","schema_version":"1.0","event_id":"sha256:54155f8a8137881239cc8be28c8c04689507bd6b50f455e0d1e0bde009c1d691"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2004:IHYHJV2O2GFCHHKRXDOC7QNEOT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Nonsingular FRW cosmology and nonlinear electrodynamics","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"C. S. Camara (UFRN), J. A. S. Lima (IAG-Usp, J. C. Carvalho (UFRN), M. R. de Garcia Maia (UFRN), UFRN)","submitted_at":"2004-02-12T19:43:23Z","abstract_excerpt":"The possibility to avoid the cosmic initial singularity as a consequence of nonlinear effects on the Maxwell eletromagnetic theory is discussed. For a flat FRW geometry we derive the general nonsingular solution supported by a magnetic field plus a cosmic fluid and a nonvanishing vacuum energy density. The nonsingular behavior of solutions with a time-dependent $\\Lambda(t)$-term are also examined. As a general result, it is found that the functional dependence of $\\Lambda(t)$ can uniquely be determined only if the magnetic field remains constant. All these models are examples of bouncing unive"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0402311","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0402311/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T16:43:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2QQaDho5pNbGehXDe/rfXfzKycJ53SGtI6Lxy45hwhYzhIZSV6bL9SDzMqUFFTTHgZMnhMzE2oRObpPQQGFnBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T06:07:41.362759Z"},"content_sha256":"f47ca0e03d28667380ed6ea395c21f2a66a7956cf3d5bc310fea4cd3bd70d60e","schema_version":"1.0","event_id":"sha256:f47ca0e03d28667380ed6ea395c21f2a66a7956cf3d5bc310fea4cd3bd70d60e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IHYHJV2O2GFCHHKRXDOC7QNEOT/bundle.json","state_url":"https://pith.science/pith/IHYHJV2O2GFCHHKRXDOC7QNEOT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IHYHJV2O2GFCHHKRXDOC7QNEOT/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":"2026-08-13T06:07:41Z","links":{"resolver":"https://pith.science/pith/IHYHJV2O2GFCHHKRXDOC7QNEOT","bundle":"https://pith.science/pith/IHYHJV2O2GFCHHKRXDOC7QNEOT/bundle.json","state":"https://pith.science/pith/IHYHJV2O2GFCHHKRXDOC7QNEOT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IHYHJV2O2GFCHHKRXDOC7QNEOT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:IHYHJV2O2GFCHHKRXDOC7QNEOT","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":"bbf48439cb2b84886510e8daf76651fa1b329293e9edd7f6856d97e177907142","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-02-12T19:43:23Z","title_canon_sha256":"3370dcc0b4a6f7b377f15bc6b130f233e1213c08a869d3ab8d05b487a3a805d1"},"schema_version":"1.0","source":{"id":"astro-ph/0402311","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0402311","created_at":"2026-07-04T16:43:01Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0402311v1","created_at":"2026-07-04T16:43:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0402311","created_at":"2026-07-04T16:43:01Z"},{"alias_kind":"pith_short_12","alias_value":"IHYHJV2O2GFC","created_at":"2026-07-04T16:43:01Z"},{"alias_kind":"pith_short_16","alias_value":"IHYHJV2O2GFCHHKR","created_at":"2026-07-04T16:43:01Z"},{"alias_kind":"pith_short_8","alias_value":"IHYHJV2O","created_at":"2026-07-04T16:43:01Z"}],"graph_snapshots":[{"event_id":"sha256:f47ca0e03d28667380ed6ea395c21f2a66a7956cf3d5bc310fea4cd3bd70d60e","target":"graph","created_at":"2026-07-04T16:43:01Z","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/astro-ph/0402311/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The possibility to avoid the cosmic initial singularity as a consequence of nonlinear effects on the Maxwell eletromagnetic theory is discussed. For a flat FRW geometry we derive the general nonsingular solution supported by a magnetic field plus a cosmic fluid and a nonvanishing vacuum energy density. The nonsingular behavior of solutions with a time-dependent $\\Lambda(t)$-term are also examined. As a general result, it is found that the functional dependence of $\\Lambda(t)$ can uniquely be determined only if the magnetic field remains constant. All these models are examples of bouncing unive","authors_text":"C. S. Camara (UFRN), J. A. S. Lima (IAG-Usp, J. C. Carvalho (UFRN), M. R. de Garcia Maia (UFRN), UFRN)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2004-02-12T19:43:23Z","title":"Nonsingular FRW cosmology and nonlinear electrodynamics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0402311","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":"sha256:54155f8a8137881239cc8be28c8c04689507bd6b50f455e0d1e0bde009c1d691","target":"record","created_at":"2026-07-04T16:43:01Z","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":"bbf48439cb2b84886510e8daf76651fa1b329293e9edd7f6856d97e177907142","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-02-12T19:43:23Z","title_canon_sha256":"3370dcc0b4a6f7b377f15bc6b130f233e1213c08a869d3ab8d05b487a3a805d1"},"schema_version":"1.0","source":{"id":"astro-ph/0402311","kind":"arxiv","version":1}},"canonical_sha256":"41f074d74ed18a239d51b8dc2fc1a474df281429b4e54004055cb29186f8363d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"41f074d74ed18a239d51b8dc2fc1a474df281429b4e54004055cb29186f8363d","first_computed_at":"2026-07-04T16:43:01.900738Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:43:01.900738Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vBgIghuwHHcuY+6ipeUxdFjmkq+AFu1p5CcV+rkqthnPbU2rHkgC07BAMrat/HnxyQv2c/7wEfzzitdv+tetAA==","signature_status":"signed_v1","signed_at":"2026-07-04T16:43:01.901221Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0402311","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:54155f8a8137881239cc8be28c8c04689507bd6b50f455e0d1e0bde009c1d691","sha256:f47ca0e03d28667380ed6ea395c21f2a66a7956cf3d5bc310fea4cd3bd70d60e"],"state_sha256":"76808236f2f81233ad8467c56c3cb1c4b9ed8d4a169ae342063037e95daffc89"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ftK/XdrpnstiKn9QbpSaLPHuCvW0vpANWNc+4RhctI4g0t7KUzqptDzy+Px8ovNTbk93eZeV9BLrMi6C70M8CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-13T06:07:41.368362Z","bundle_sha256":"ec771fc56b324e97182e2fa16a5adfc2111935db3a33232f2bf7807e9cd12a12"}}