{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:GPF5LMJFVX72CSSLLFZOJGDBGU","short_pith_number":"pith:GPF5LMJF","schema_version":"1.0","canonical_sha256":"33cbd5b125adffa14a4b5972e498613513644b475fd737bd6a1a16b8811fd6a0","source":{"kind":"arxiv","id":"1804.09886","version":1},"attestation_state":"computed","paper":{"title":"Growth of perturbations in dark energy parametrization scenarios","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. Mehrabi","submitted_at":"2018-04-26T04:54:18Z","abstract_excerpt":"In this paper, we study the evolution of dark matter perturbations in the linear regime by considering the possibility of dark energy perturbations. To do this, two popular parameterizations, CPL and BA with same number of free parameters and different redshift dependency have been considered. We integrate the full relativistic equations to obtain the growth of matter fluctuations for both clustering and smooth versions of CPL and BA dark energy. The growth rate is larger (smaller) than the $\\Lambda$CDM in the smooth cases when $w<-1$ ($w>-1$) but the dark energy clustering gives a larger (sma"},"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":"1804.09886","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-04-26T04:54:18Z","cross_cats_sorted":[],"title_canon_sha256":"1435fb65b1f0bef038033e9de2e6aad2cf5478a9d06994ec7bf5721261e28754","abstract_canon_sha256":"2fed156ec20bbd1a37b0c54fcc25ffb5dad9649b798128db31dd077911e22a44"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:15:13.868491Z","signature_b64":"qK8oX5jEQpzsPaJlp1Wd7eolXPT1Q+SU4RXCFStCdW5rSloZ2IS75LXo67pLOfGKQKuoF2ha6cRKgPXPn+S6AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"33cbd5b125adffa14a4b5972e498613513644b475fd737bd6a1a16b8811fd6a0","last_reissued_at":"2026-05-18T00:15:13.867874Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:15:13.867874Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Growth of perturbations in dark energy parametrization scenarios","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. Mehrabi","submitted_at":"2018-04-26T04:54:18Z","abstract_excerpt":"In this paper, we study the evolution of dark matter perturbations in the linear regime by considering the possibility of dark energy perturbations. To do this, two popular parameterizations, CPL and BA with same number of free parameters and different redshift dependency have been considered. We integrate the full relativistic equations to obtain the growth of matter fluctuations for both clustering and smooth versions of CPL and BA dark energy. The growth rate is larger (smaller) than the $\\Lambda$CDM in the smooth cases when $w<-1$ ($w>-1$) but the dark energy clustering gives a larger (sma"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.09886","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":"1804.09886","created_at":"2026-05-18T00:15:13.867988+00:00"},{"alias_kind":"arxiv_version","alias_value":"1804.09886v1","created_at":"2026-05-18T00:15:13.867988+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.09886","created_at":"2026-05-18T00:15:13.867988+00:00"},{"alias_kind":"pith_short_12","alias_value":"GPF5LMJFVX72","created_at":"2026-05-18T12:32:25.280505+00:00"},{"alias_kind":"pith_short_16","alias_value":"GPF5LMJFVX72CSSL","created_at":"2026-05-18T12:32:25.280505+00:00"},{"alias_kind":"pith_short_8","alias_value":"GPF5LMJF","created_at":"2026-05-18T12:32:25.280505+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/GPF5LMJFVX72CSSLLFZOJGDBGU","json":"https://pith.science/pith/GPF5LMJFVX72CSSLLFZOJGDBGU.json","graph_json":"https://pith.science/api/pith-number/GPF5LMJFVX72CSSLLFZOJGDBGU/graph.json","events_json":"https://pith.science/api/pith-number/GPF5LMJFVX72CSSLLFZOJGDBGU/events.json","paper":"https://pith.science/paper/GPF5LMJF"},"agent_actions":{"view_html":"https://pith.science/pith/GPF5LMJFVX72CSSLLFZOJGDBGU","download_json":"https://pith.science/pith/GPF5LMJFVX72CSSLLFZOJGDBGU.json","view_paper":"https://pith.science/paper/GPF5LMJF","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1804.09886&json=true","fetch_graph":"https://pith.science/api/pith-number/GPF5LMJFVX72CSSLLFZOJGDBGU/graph.json","fetch_events":"https://pith.science/api/pith-number/GPF5LMJFVX72CSSLLFZOJGDBGU/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/GPF5LMJFVX72CSSLLFZOJGDBGU/action/timestamp_anchor","attest_storage":"https://pith.science/pith/GPF5LMJFVX72CSSLLFZOJGDBGU/action/storage_attestation","attest_author":"https://pith.science/pith/GPF5LMJFVX72CSSLLFZOJGDBGU/action/author_attestation","sign_citation":"https://pith.science/pith/GPF5LMJFVX72CSSLLFZOJGDBGU/action/citation_signature","submit_replication":"https://pith.science/pith/GPF5LMJFVX72CSSLLFZOJGDBGU/action/replication_record"}},"created_at":"2026-05-18T00:15:13.867988+00:00","updated_at":"2026-05-18T00:15:13.867988+00:00"}