{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2012:CKYLT6BY2I5CWOYHX4WTJDO77O","short_pith_number":"pith:CKYLT6BY","schema_version":"1.0","canonical_sha256":"12b0b9f838d23a2b3b07bf2d348ddffbaf0985b406f3bfc4f458bb8fb6c3d9b9","source":{"kind":"arxiv","id":"1202.1397","version":1},"attestation_state":"computed","paper":{"title":"Oscillating universe in the DGP braneworld","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"gr-qc","authors_text":"Hongwei Yu, Kaituo Zhang, Puxun Wu","submitted_at":"2012-02-07T11:34:52Z","abstract_excerpt":"With a method in which the Friedmann equation is written in a form such that evolution of the scale factor can be treated as that of a particle in a \"potential\", we classify all possible cosmic evolutions in the DGP braneworld scenario with the dark radiation term retained. By assuming that the energy component is pressureless matter, radiation or vacuum energy, respectively, we find that in the matter or vacuum energy dominated case, the scale factor has a minimum value $a_0$. In the matter dominated case, the big bang singularity can be avoided in some special circumstances, and there may ex"},"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":"1202.1397","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2012-02-07T11:34:52Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"aae27afe9e3a69baadddaf0e92fcd9b20585b3da9af4d2689d6b3f78f969f10a","abstract_canon_sha256":"073bab325cea53906267a1096400710b98dd40129431c0c5db0bce5e6f0d3a77"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:43:29.634195Z","signature_b64":"JC8bUkyaOJBUqc5fTiWv5ULFOzg8JKikByLqEAyh1CkXbQ5sASxZ6Tzu3TOh1JxzOjlSWrHamiIyBkCI4HG/Aw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"12b0b9f838d23a2b3b07bf2d348ddffbaf0985b406f3bfc4f458bb8fb6c3d9b9","last_reissued_at":"2026-05-18T03:43:29.633588Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:43:29.633588Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Oscillating universe in the DGP braneworld","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"gr-qc","authors_text":"Hongwei Yu, Kaituo Zhang, Puxun Wu","submitted_at":"2012-02-07T11:34:52Z","abstract_excerpt":"With a method in which the Friedmann equation is written in a form such that evolution of the scale factor can be treated as that of a particle in a \"potential\", we classify all possible cosmic evolutions in the DGP braneworld scenario with the dark radiation term retained. By assuming that the energy component is pressureless matter, radiation or vacuum energy, respectively, we find that in the matter or vacuum energy dominated case, the scale factor has a minimum value $a_0$. In the matter dominated case, the big bang singularity can be avoided in some special circumstances, and there may ex"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.1397","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":"1202.1397","created_at":"2026-05-18T03:43:29.633671+00:00"},{"alias_kind":"arxiv_version","alias_value":"1202.1397v1","created_at":"2026-05-18T03:43:29.633671+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.1397","created_at":"2026-05-18T03:43:29.633671+00:00"},{"alias_kind":"pith_short_12","alias_value":"CKYLT6BY2I5C","created_at":"2026-05-18T12:27:01.376967+00:00"},{"alias_kind":"pith_short_16","alias_value":"CKYLT6BY2I5CWOYH","created_at":"2026-05-18T12:27:01.376967+00:00"},{"alias_kind":"pith_short_8","alias_value":"CKYLT6BY","created_at":"2026-05-18T12:27:01.376967+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/CKYLT6BY2I5CWOYHX4WTJDO77O","json":"https://pith.science/pith/CKYLT6BY2I5CWOYHX4WTJDO77O.json","graph_json":"https://pith.science/api/pith-number/CKYLT6BY2I5CWOYHX4WTJDO77O/graph.json","events_json":"https://pith.science/api/pith-number/CKYLT6BY2I5CWOYHX4WTJDO77O/events.json","paper":"https://pith.science/paper/CKYLT6BY"},"agent_actions":{"view_html":"https://pith.science/pith/CKYLT6BY2I5CWOYHX4WTJDO77O","download_json":"https://pith.science/pith/CKYLT6BY2I5CWOYHX4WTJDO77O.json","view_paper":"https://pith.science/paper/CKYLT6BY","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1202.1397&json=true","fetch_graph":"https://pith.science/api/pith-number/CKYLT6BY2I5CWOYHX4WTJDO77O/graph.json","fetch_events":"https://pith.science/api/pith-number/CKYLT6BY2I5CWOYHX4WTJDO77O/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/CKYLT6BY2I5CWOYHX4WTJDO77O/action/timestamp_anchor","attest_storage":"https://pith.science/pith/CKYLT6BY2I5CWOYHX4WTJDO77O/action/storage_attestation","attest_author":"https://pith.science/pith/CKYLT6BY2I5CWOYHX4WTJDO77O/action/author_attestation","sign_citation":"https://pith.science/pith/CKYLT6BY2I5CWOYHX4WTJDO77O/action/citation_signature","submit_replication":"https://pith.science/pith/CKYLT6BY2I5CWOYHX4WTJDO77O/action/replication_record"}},"created_at":"2026-05-18T03:43:29.633671+00:00","updated_at":"2026-05-18T03:43:29.633671+00:00"}