{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:KRXPCLDQPWUTNY4WLMRBE6VMJJ","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"97178e431a81fa4f508cab114d3a9e745cbe52e4c924b05a627a32596339a576","cross_cats_sorted":["hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2015-02-04T13:26:58Z","title_canon_sha256":"21d131389de4c847db39cd4f444cbc68eaf53aed5b7af6c113c756a0fed64d2d"},"schema_version":"1.0","source":{"id":"1502.01189","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.01189","created_at":"2026-05-18T02:19:52Z"},{"alias_kind":"arxiv_version","alias_value":"1502.01189v1","created_at":"2026-05-18T02:19:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.01189","created_at":"2026-05-18T02:19:52Z"},{"alias_kind":"pith_short_12","alias_value":"KRXPCLDQPWUT","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_16","alias_value":"KRXPCLDQPWUTNY4W","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_8","alias_value":"KRXPCLDQ","created_at":"2026-05-18T12:29:29Z"}],"graph_snapshots":[{"event_id":"sha256:95a61aa8c6d6a2d9349872195889897de7dc5972c36f48c849739201fca1174c","target":"graph","created_at":"2026-05-18T02:19:52Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"In this paper, we consider a universe dominated by the extended Chaplygin gas which recently proposed as the last version of Chaplygin gas models. Here, we only consider the second order term which recovers quadratic barotropic fluid equation of state. The density perturbations analyzed in both relativistic and Newtonian regimes and show that the model is stable without any phase transition and critical point. We confirmed stability of the model using thermodynamics point of view.","authors_text":"B. Pourhassan, E.O. Kahya","cross_cats":["hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2015-02-04T13:26:58Z","title":"The universe dominated by the extended Chaplygin gas"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.01189","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:3aca9a8ee1b30c13582cb49a15c960d26facd3169b773404832a92a6dbf7c521","target":"record","created_at":"2026-05-18T02:19:52Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"97178e431a81fa4f508cab114d3a9e745cbe52e4c924b05a627a32596339a576","cross_cats_sorted":["hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2015-02-04T13:26:58Z","title_canon_sha256":"21d131389de4c847db39cd4f444cbc68eaf53aed5b7af6c113c756a0fed64d2d"},"schema_version":"1.0","source":{"id":"1502.01189","kind":"arxiv","version":1}},"canonical_sha256":"546ef12c707da936e3965b22127aac4a7ed79c23dee99a520932dbcf20765daf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"546ef12c707da936e3965b22127aac4a7ed79c23dee99a520932dbcf20765daf","first_computed_at":"2026-05-18T02:19:52.317359Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:19:52.317359Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rGml5ogocwN0AgriEkpYYGGC6J6zB6KEk9VVaK6nYFbTECtGPtH95uNbVS+e/InCtkl/8wfZ1KMlCJTCA/BYDA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:19:52.317936Z","signed_message":"canonical_sha256_bytes"},"source_id":"1502.01189","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3aca9a8ee1b30c13582cb49a15c960d26facd3169b773404832a92a6dbf7c521","sha256:95a61aa8c6d6a2d9349872195889897de7dc5972c36f48c849739201fca1174c"],"state_sha256":"1f486d1351e019bbe10775411c02fdc85850d838d0de4996e6931daf6dc5913a"}