{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2012:FE4EJU3GPPL4ZI6EMVJRRW56TK","short_pith_number":"pith:FE4EJU3G","schema_version":"1.0","canonical_sha256":"293844d3667bd7cca3c4655318dbbe9a8f0ce01ee5e5c7f9046cd90d189841ea","source":{"kind":"arxiv","id":"1201.6448","version":2},"attestation_state":"computed","paper":{"title":"Cosmological dynamics of brane f(R) gravity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th"],"primary_cat":"gr-qc","authors_text":"Hamid Reza Sepangi, Shahab Shahidi, Zahra Haghani","submitted_at":"2012-01-31T05:07:02Z","abstract_excerpt":"The cosmological dynamics of a brane world scenario where the bulk action is taken as a generic function of the Ricci scalar is considered in a framework where the use of the $\\mathbb{Z}_2$ symmetry and Israel junction conditions are relaxed. The corresponding cosmological solutions for some specific forms of $f(\\mc{R})$ are obtained and shown to be in the form of exponential as well as power law for a vacuum brane space-time. It is shown that the existence of matter dominated epoch for a bulk action in the form of a power law for $\\cal R$ can only be obtained in the presence of ordinary matte"},"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":"1201.6448","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2012-01-31T05:07:02Z","cross_cats_sorted":["hep-th"],"title_canon_sha256":"4ee991d3a3bddda01171b14aadf6f507f9aff87b84690a47077adf792248ce6a","abstract_canon_sha256":"40167c51302fc8a4901ac483f496b6b00e35907b3685e64bf7acaa6b6552cd7e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:16:17.629745Z","signature_b64":"syGJAafiXZjz9+RfVhEvR3KEelch9dUJ8nDGdpys/SZe/R+v9u2n8opcGJSECi1kFc0Tirx0agSamrjr0vEIAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"293844d3667bd7cca3c4655318dbbe9a8f0ce01ee5e5c7f9046cd90d189841ea","last_reissued_at":"2026-05-18T03:16:17.628975Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:16:17.628975Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Cosmological dynamics of brane f(R) gravity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th"],"primary_cat":"gr-qc","authors_text":"Hamid Reza Sepangi, Shahab Shahidi, Zahra Haghani","submitted_at":"2012-01-31T05:07:02Z","abstract_excerpt":"The cosmological dynamics of a brane world scenario where the bulk action is taken as a generic function of the Ricci scalar is considered in a framework where the use of the $\\mathbb{Z}_2$ symmetry and Israel junction conditions are relaxed. The corresponding cosmological solutions for some specific forms of $f(\\mc{R})$ are obtained and shown to be in the form of exponential as well as power law for a vacuum brane space-time. It is shown that the existence of matter dominated epoch for a bulk action in the form of a power law for $\\cal R$ can only be obtained in the presence of ordinary matte"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.6448","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1201.6448","created_at":"2026-05-18T03:16:17.629095+00:00"},{"alias_kind":"arxiv_version","alias_value":"1201.6448v2","created_at":"2026-05-18T03:16:17.629095+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.6448","created_at":"2026-05-18T03:16:17.629095+00:00"},{"alias_kind":"pith_short_12","alias_value":"FE4EJU3GPPL4","created_at":"2026-05-18T12:27:06.952714+00:00"},{"alias_kind":"pith_short_16","alias_value":"FE4EJU3GPPL4ZI6E","created_at":"2026-05-18T12:27:06.952714+00:00"},{"alias_kind":"pith_short_8","alias_value":"FE4EJU3G","created_at":"2026-05-18T12:27:06.952714+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/FE4EJU3GPPL4ZI6EMVJRRW56TK","json":"https://pith.science/pith/FE4EJU3GPPL4ZI6EMVJRRW56TK.json","graph_json":"https://pith.science/api/pith-number/FE4EJU3GPPL4ZI6EMVJRRW56TK/graph.json","events_json":"https://pith.science/api/pith-number/FE4EJU3GPPL4ZI6EMVJRRW56TK/events.json","paper":"https://pith.science/paper/FE4EJU3G"},"agent_actions":{"view_html":"https://pith.science/pith/FE4EJU3GPPL4ZI6EMVJRRW56TK","download_json":"https://pith.science/pith/FE4EJU3GPPL4ZI6EMVJRRW56TK.json","view_paper":"https://pith.science/paper/FE4EJU3G","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1201.6448&json=true","fetch_graph":"https://pith.science/api/pith-number/FE4EJU3GPPL4ZI6EMVJRRW56TK/graph.json","fetch_events":"https://pith.science/api/pith-number/FE4EJU3GPPL4ZI6EMVJRRW56TK/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/FE4EJU3GPPL4ZI6EMVJRRW56TK/action/timestamp_anchor","attest_storage":"https://pith.science/pith/FE4EJU3GPPL4ZI6EMVJRRW56TK/action/storage_attestation","attest_author":"https://pith.science/pith/FE4EJU3GPPL4ZI6EMVJRRW56TK/action/author_attestation","sign_citation":"https://pith.science/pith/FE4EJU3GPPL4ZI6EMVJRRW56TK/action/citation_signature","submit_replication":"https://pith.science/pith/FE4EJU3GPPL4ZI6EMVJRRW56TK/action/replication_record"}},"created_at":"2026-05-18T03:16:17.629095+00:00","updated_at":"2026-05-18T03:16:17.629095+00:00"}