{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2012:DIG5RXVCAXFMKWTRXGO6KULC7L","short_pith_number":"pith:DIG5RXVC","schema_version":"1.0","canonical_sha256":"1a0dd8dea205cac55a71b99de55162faec5a17b8ad345e69cfe5ccc97d5d4bba","source":{"kind":"arxiv","id":"1203.0523","version":2},"attestation_state":"computed","paper":{"title":"Traversable Wormholes and Time Machines in non-minimally coupled curvature-matter $f(R)$ theories","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","hep-th"],"primary_cat":"gr-qc","authors_text":"Orfeu Bertolami, Ricardo Zambujal Ferreira","submitted_at":"2012-03-02T17:13:46Z","abstract_excerpt":"We obtain traversable wormhole and time machine solutions of the field equations of an alternative of gravity with non-minimally curvature-matter coupling. Our solutions exhibit a non-trivial redshift function and allow for matter that satisfy the dominant energy condition."},"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":"1203.0523","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2012-03-02T17:13:46Z","cross_cats_sorted":["astro-ph.CO","hep-th"],"title_canon_sha256":"40614c0f1df235044cc9d09ab45522c54355cc2694f4246795603092a3e053af","abstract_canon_sha256":"23bf51ecabb8b47872d3d1341a96b9697188b351b8b8fc8d4c416cfeaaa18065"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:22:51.747067Z","signature_b64":"WqnEThC7Q++oiNZSpk0PKKvn7deKof0H9p1SSMU5iYUU2sr4trFsx5pYkPWkOnN1oS3FyiKxC4li3lXR1cknAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1a0dd8dea205cac55a71b99de55162faec5a17b8ad345e69cfe5ccc97d5d4bba","last_reissued_at":"2026-05-18T03:22:51.746528Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:22:51.746528Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Traversable Wormholes and Time Machines in non-minimally coupled curvature-matter $f(R)$ theories","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","hep-th"],"primary_cat":"gr-qc","authors_text":"Orfeu Bertolami, Ricardo Zambujal Ferreira","submitted_at":"2012-03-02T17:13:46Z","abstract_excerpt":"We obtain traversable wormhole and time machine solutions of the field equations of an alternative of gravity with non-minimally curvature-matter coupling. Our solutions exhibit a non-trivial redshift function and allow for matter that satisfy the dominant energy condition."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.0523","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":"1203.0523","created_at":"2026-05-18T03:22:51.746604+00:00"},{"alias_kind":"arxiv_version","alias_value":"1203.0523v2","created_at":"2026-05-18T03:22:51.746604+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.0523","created_at":"2026-05-18T03:22:51.746604+00:00"},{"alias_kind":"pith_short_12","alias_value":"DIG5RXVCAXFM","created_at":"2026-05-18T12:27:04.183437+00:00"},{"alias_kind":"pith_short_16","alias_value":"DIG5RXVCAXFMKWTR","created_at":"2026-05-18T12:27:04.183437+00:00"},{"alias_kind":"pith_short_8","alias_value":"DIG5RXVC","created_at":"2026-05-18T12:27:04.183437+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/DIG5RXVCAXFMKWTRXGO6KULC7L","json":"https://pith.science/pith/DIG5RXVCAXFMKWTRXGO6KULC7L.json","graph_json":"https://pith.science/api/pith-number/DIG5RXVCAXFMKWTRXGO6KULC7L/graph.json","events_json":"https://pith.science/api/pith-number/DIG5RXVCAXFMKWTRXGO6KULC7L/events.json","paper":"https://pith.science/paper/DIG5RXVC"},"agent_actions":{"view_html":"https://pith.science/pith/DIG5RXVCAXFMKWTRXGO6KULC7L","download_json":"https://pith.science/pith/DIG5RXVCAXFMKWTRXGO6KULC7L.json","view_paper":"https://pith.science/paper/DIG5RXVC","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1203.0523&json=true","fetch_graph":"https://pith.science/api/pith-number/DIG5RXVCAXFMKWTRXGO6KULC7L/graph.json","fetch_events":"https://pith.science/api/pith-number/DIG5RXVCAXFMKWTRXGO6KULC7L/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/DIG5RXVCAXFMKWTRXGO6KULC7L/action/timestamp_anchor","attest_storage":"https://pith.science/pith/DIG5RXVCAXFMKWTRXGO6KULC7L/action/storage_attestation","attest_author":"https://pith.science/pith/DIG5RXVCAXFMKWTRXGO6KULC7L/action/author_attestation","sign_citation":"https://pith.science/pith/DIG5RXVCAXFMKWTRXGO6KULC7L/action/citation_signature","submit_replication":"https://pith.science/pith/DIG5RXVCAXFMKWTRXGO6KULC7L/action/replication_record"}},"created_at":"2026-05-18T03:22:51.746604+00:00","updated_at":"2026-05-18T03:22:51.746604+00:00"}