{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:SWFPJ2LEX7F6FRJHHND5Y37YDR","short_pith_number":"pith:SWFPJ2LE","schema_version":"1.0","canonical_sha256":"958af4e964bfcbe2c5273b47dc6ff81c5f1f6f516c010a1c7669839dedc9e4f9","source":{"kind":"arxiv","id":"0907.2798","version":1},"attestation_state":"computed","paper":{"title":"Thermodynamics of the Universe Filled with Perfect Fluid Having Variable Equation of State","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Nairwita Mazumder, Subenoy Chakraborty","submitted_at":"2009-07-16T09:45:34Z","abstract_excerpt":"We study the thermodynamics of the universe containing perfect fluid with equation of state $p=\\omega\\rho,\\omega$ is variable. Here we choose $\\omega$ to be a function of the red shift variable $z$ and four different choices of $\\omega$ has been investigated. Also the laws of thermodynamics are examined considering the universe bounded by the horizon (apparent) as a thermodynamical system."},"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":"0907.2798","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2009-07-16T09:45:34Z","cross_cats_sorted":[],"title_canon_sha256":"32b2379482129113cdbd6753130f0223d47dfcb46749d6c856367f31b159d274","abstract_canon_sha256":"7dfd4f0218283d3f5c657861739858fd3cb89312b9e4e44fcd1f99955a59776b"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:34:38.733771Z","signature_b64":"IyZx7IPTqerbAK+UrF7NveeI4UP6+hhq4hb3ajth2gNPBF3UcudTx6p1YgSxNQ7NEe/N1U+pDhIJWvAE+9hYDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"958af4e964bfcbe2c5273b47dc6ff81c5f1f6f516c010a1c7669839dedc9e4f9","last_reissued_at":"2026-05-18T02:34:38.733329Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:34:38.733329Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Thermodynamics of the Universe Filled with Perfect Fluid Having Variable Equation of State","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Nairwita Mazumder, Subenoy Chakraborty","submitted_at":"2009-07-16T09:45:34Z","abstract_excerpt":"We study the thermodynamics of the universe containing perfect fluid with equation of state $p=\\omega\\rho,\\omega$ is variable. Here we choose $\\omega$ to be a function of the red shift variable $z$ and four different choices of $\\omega$ has been investigated. Also the laws of thermodynamics are examined considering the universe bounded by the horizon (apparent) as a thermodynamical system."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0907.2798","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":"0907.2798","created_at":"2026-05-18T02:34:38.733396+00:00"},{"alias_kind":"arxiv_version","alias_value":"0907.2798v1","created_at":"2026-05-18T02:34:38.733396+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0907.2798","created_at":"2026-05-18T02:34:38.733396+00:00"},{"alias_kind":"pith_short_12","alias_value":"SWFPJ2LEX7F6","created_at":"2026-05-18T12:26:01.383474+00:00"},{"alias_kind":"pith_short_16","alias_value":"SWFPJ2LEX7F6FRJH","created_at":"2026-05-18T12:26:01.383474+00:00"},{"alias_kind":"pith_short_8","alias_value":"SWFPJ2LE","created_at":"2026-05-18T12:26:01.383474+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/SWFPJ2LEX7F6FRJHHND5Y37YDR","json":"https://pith.science/pith/SWFPJ2LEX7F6FRJHHND5Y37YDR.json","graph_json":"https://pith.science/api/pith-number/SWFPJ2LEX7F6FRJHHND5Y37YDR/graph.json","events_json":"https://pith.science/api/pith-number/SWFPJ2LEX7F6FRJHHND5Y37YDR/events.json","paper":"https://pith.science/paper/SWFPJ2LE"},"agent_actions":{"view_html":"https://pith.science/pith/SWFPJ2LEX7F6FRJHHND5Y37YDR","download_json":"https://pith.science/pith/SWFPJ2LEX7F6FRJHHND5Y37YDR.json","view_paper":"https://pith.science/paper/SWFPJ2LE","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0907.2798&json=true","fetch_graph":"https://pith.science/api/pith-number/SWFPJ2LEX7F6FRJHHND5Y37YDR/graph.json","fetch_events":"https://pith.science/api/pith-number/SWFPJ2LEX7F6FRJHHND5Y37YDR/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/SWFPJ2LEX7F6FRJHHND5Y37YDR/action/timestamp_anchor","attest_storage":"https://pith.science/pith/SWFPJ2LEX7F6FRJHHND5Y37YDR/action/storage_attestation","attest_author":"https://pith.science/pith/SWFPJ2LEX7F6FRJHHND5Y37YDR/action/author_attestation","sign_citation":"https://pith.science/pith/SWFPJ2LEX7F6FRJHHND5Y37YDR/action/citation_signature","submit_replication":"https://pith.science/pith/SWFPJ2LEX7F6FRJHHND5Y37YDR/action/replication_record"}},"created_at":"2026-05-18T02:34:38.733396+00:00","updated_at":"2026-05-18T02:34:38.733396+00:00"}