{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:MLQAVIFK6YVOUS4ON53A7HCNAX","short_pith_number":"pith:MLQAVIFK","schema_version":"1.0","canonical_sha256":"62e00aa0aaf62aea4b8e6f760f9c4d05f10fbe1d194a50d90a5ad4726caccfa1","source":{"kind":"arxiv","id":"2605.21990","version":1},"attestation_state":"computed","paper":{"title":"Thermodynamic acceptability of spherically symmetric perfect-fluid solutions in general relativity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Dina Demissenova, Hernando Quevedo, Kuantay Boshkayev, Nurzada Beissen","submitted_at":"2026-05-21T04:38:36Z","abstract_excerpt":"Static spherically symmetric perfect-fluid solutions of Einstein's equations play a central role in relativistic astrophysics and stellar structure theory. While many exact solutions satisfy Einstein's equations mathematically, only a limited subset satisfies physically acceptable conditions such as regularity, positivity of matter variables, and causal sound propagation. In this work, the classical concept of physical acceptability is extended to include thermodynamic considerations. Using relativistic equilibrium thermodynamics, entropy functionals, and the Tolman temperature relation, we fo"},"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":"2605.21990","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2026-05-21T04:38:36Z","cross_cats_sorted":[],"title_canon_sha256":"65368a3436606b2f4a4f276498529b430faffdb5f8ba4374393243f377cf507d","abstract_canon_sha256":"b11b02edcc08412f807e02698acf922b024ee2af4b3f353a86d99a1c7ce56218"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-22T01:04:19.209546Z","signature_b64":"wy2TNfREbaM3BHJJe8LFF0pwf2ZJyjvoYckvG7jJHS+OjSx0fiNqb9xV03ks3INZ+0LmwSklcBWtp9ZoUuZCDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"62e00aa0aaf62aea4b8e6f760f9c4d05f10fbe1d194a50d90a5ad4726caccfa1","last_reissued_at":"2026-05-22T01:04:19.208978Z","signature_status":"signed_v1","first_computed_at":"2026-05-22T01:04:19.208978Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Thermodynamic acceptability of spherically symmetric perfect-fluid solutions in general relativity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Dina Demissenova, Hernando Quevedo, Kuantay Boshkayev, Nurzada Beissen","submitted_at":"2026-05-21T04:38:36Z","abstract_excerpt":"Static spherically symmetric perfect-fluid solutions of Einstein's equations play a central role in relativistic astrophysics and stellar structure theory. While many exact solutions satisfy Einstein's equations mathematically, only a limited subset satisfies physically acceptable conditions such as regularity, positivity of matter variables, and causal sound propagation. In this work, the classical concept of physical acceptability is extended to include thermodynamic considerations. Using relativistic equilibrium thermodynamics, entropy functionals, and the Tolman temperature relation, we fo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.21990","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/2605.21990/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2605.21990","created_at":"2026-05-22T01:04:19.209086+00:00"},{"alias_kind":"arxiv_version","alias_value":"2605.21990v1","created_at":"2026-05-22T01:04:19.209086+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.21990","created_at":"2026-05-22T01:04:19.209086+00:00"},{"alias_kind":"pith_short_12","alias_value":"MLQAVIFK6YVO","created_at":"2026-05-22T01:04:19.209086+00:00"},{"alias_kind":"pith_short_16","alias_value":"MLQAVIFK6YVOUS4O","created_at":"2026-05-22T01:04:19.209086+00:00"},{"alias_kind":"pith_short_8","alias_value":"MLQAVIFK","created_at":"2026-05-22T01:04:19.209086+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/MLQAVIFK6YVOUS4ON53A7HCNAX","json":"https://pith.science/pith/MLQAVIFK6YVOUS4ON53A7HCNAX.json","graph_json":"https://pith.science/api/pith-number/MLQAVIFK6YVOUS4ON53A7HCNAX/graph.json","events_json":"https://pith.science/api/pith-number/MLQAVIFK6YVOUS4ON53A7HCNAX/events.json","paper":"https://pith.science/paper/MLQAVIFK"},"agent_actions":{"view_html":"https://pith.science/pith/MLQAVIFK6YVOUS4ON53A7HCNAX","download_json":"https://pith.science/pith/MLQAVIFK6YVOUS4ON53A7HCNAX.json","view_paper":"https://pith.science/paper/MLQAVIFK","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2605.21990&json=true","fetch_graph":"https://pith.science/api/pith-number/MLQAVIFK6YVOUS4ON53A7HCNAX/graph.json","fetch_events":"https://pith.science/api/pith-number/MLQAVIFK6YVOUS4ON53A7HCNAX/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/MLQAVIFK6YVOUS4ON53A7HCNAX/action/timestamp_anchor","attest_storage":"https://pith.science/pith/MLQAVIFK6YVOUS4ON53A7HCNAX/action/storage_attestation","attest_author":"https://pith.science/pith/MLQAVIFK6YVOUS4ON53A7HCNAX/action/author_attestation","sign_citation":"https://pith.science/pith/MLQAVIFK6YVOUS4ON53A7HCNAX/action/citation_signature","submit_replication":"https://pith.science/pith/MLQAVIFK6YVOUS4ON53A7HCNAX/action/replication_record"}},"created_at":"2026-05-22T01:04:19.209086+00:00","updated_at":"2026-05-22T01:04:19.209086+00:00"}