{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2003:HZ2QEX3BEMFCWAUFMO53RMXOJ3","short_pith_number":"pith:HZ2QEX3B","schema_version":"1.0","canonical_sha256":"3e75025f61230a2b028563bbb8b2ee4ed55c377bf4e49f6c63896585fd7b2841","source":{"kind":"arxiv","id":"hep-th/0302181","version":1},"attestation_state":"computed","paper":{"title":"Construction of nonsingular cosmological solutions in string theories","license":"","headline":"","cross_cats":["astro-ph","gr-qc","hep-ph"],"primary_cat":"hep-th","authors_text":"Shinji Tsujikawa (Univ. of Tokyo)","submitted_at":"2003-02-24T02:28:54Z","abstract_excerpt":"We study nonsingular cosmological scenarios in a general $D$-dimensional string effective action of the dilaton-modulus-axion system in the presence of the matter source. In the standard dilatonic Brans-Dicke parameter ($\\omega=-1$) with radiation, we analytically obtain singularity-free bouncing solutions where the universe starts out in a state with a finite curvature and evolves toward the weakly coupled regime. We apply this analytic method to the string-gas cosmology including the massive state in addition to the leading massless state (radiation), with and without the axion. We numerical"},"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":"hep-th/0302181","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-th","submitted_at":"2003-02-24T02:28:54Z","cross_cats_sorted":["astro-ph","gr-qc","hep-ph"],"title_canon_sha256":"67e0966eb3b14fd5c25dc7f88733ab49946dd80ec681f3283026df3ea3c20e49","abstract_canon_sha256":"54f6280a823691781b0dbc3d599b85f8894b6972253b560d435906ceb946803d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:35:53.080293Z","signature_b64":"EP609PFwHIB4cSZNcaYxSOS2+r+NGfv7gevaKxrdBa3jzJMXo2QSbqVwIW1unJ9u+8A0DcxAwfQpjbB/lKwPDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3e75025f61230a2b028563bbb8b2ee4ed55c377bf4e49f6c63896585fd7b2841","last_reissued_at":"2026-05-18T02:35:53.079839Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:35:53.079839Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Construction of nonsingular cosmological solutions in string theories","license":"","headline":"","cross_cats":["astro-ph","gr-qc","hep-ph"],"primary_cat":"hep-th","authors_text":"Shinji Tsujikawa (Univ. of Tokyo)","submitted_at":"2003-02-24T02:28:54Z","abstract_excerpt":"We study nonsingular cosmological scenarios in a general $D$-dimensional string effective action of the dilaton-modulus-axion system in the presence of the matter source. In the standard dilatonic Brans-Dicke parameter ($\\omega=-1$) with radiation, we analytically obtain singularity-free bouncing solutions where the universe starts out in a state with a finite curvature and evolves toward the weakly coupled regime. We apply this analytic method to the string-gas cosmology including the massive state in addition to the leading massless state (radiation), with and without the axion. We numerical"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-th/0302181","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":"hep-th/0302181","created_at":"2026-05-18T02:35:53.079910+00:00"},{"alias_kind":"arxiv_version","alias_value":"hep-th/0302181v1","created_at":"2026-05-18T02:35:53.079910+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-th/0302181","created_at":"2026-05-18T02:35:53.079910+00:00"},{"alias_kind":"pith_short_12","alias_value":"HZ2QEX3BEMFC","created_at":"2026-05-18T12:25:52.051335+00:00"},{"alias_kind":"pith_short_16","alias_value":"HZ2QEX3BEMFCWAUF","created_at":"2026-05-18T12:25:52.051335+00:00"},{"alias_kind":"pith_short_8","alias_value":"HZ2QEX3B","created_at":"2026-05-18T12:25:52.051335+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/HZ2QEX3BEMFCWAUFMO53RMXOJ3","json":"https://pith.science/pith/HZ2QEX3BEMFCWAUFMO53RMXOJ3.json","graph_json":"https://pith.science/api/pith-number/HZ2QEX3BEMFCWAUFMO53RMXOJ3/graph.json","events_json":"https://pith.science/api/pith-number/HZ2QEX3BEMFCWAUFMO53RMXOJ3/events.json","paper":"https://pith.science/paper/HZ2QEX3B"},"agent_actions":{"view_html":"https://pith.science/pith/HZ2QEX3BEMFCWAUFMO53RMXOJ3","download_json":"https://pith.science/pith/HZ2QEX3BEMFCWAUFMO53RMXOJ3.json","view_paper":"https://pith.science/paper/HZ2QEX3B","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=hep-th/0302181&json=true","fetch_graph":"https://pith.science/api/pith-number/HZ2QEX3BEMFCWAUFMO53RMXOJ3/graph.json","fetch_events":"https://pith.science/api/pith-number/HZ2QEX3BEMFCWAUFMO53RMXOJ3/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/HZ2QEX3BEMFCWAUFMO53RMXOJ3/action/timestamp_anchor","attest_storage":"https://pith.science/pith/HZ2QEX3BEMFCWAUFMO53RMXOJ3/action/storage_attestation","attest_author":"https://pith.science/pith/HZ2QEX3BEMFCWAUFMO53RMXOJ3/action/author_attestation","sign_citation":"https://pith.science/pith/HZ2QEX3BEMFCWAUFMO53RMXOJ3/action/citation_signature","submit_replication":"https://pith.science/pith/HZ2QEX3BEMFCWAUFMO53RMXOJ3/action/replication_record"}},"created_at":"2026-05-18T02:35:53.079910+00:00","updated_at":"2026-05-18T02:35:53.079910+00:00"}