{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:AVJYJGHTKNOQ55G7XDNPSCLD5A","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":"f0e9aeb8818b5a9a20a03e694211aa437f347d8c7db37382ee4b7228fc187e32","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-01-07T15:12:29Z","title_canon_sha256":"b40a7d82cf5be9db2baeb241f2ebd8d6dba74d1ace80c4506594cb1686c90fe1"},"schema_version":"1.0","source":{"id":"1301.1224","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1301.1224","created_at":"2026-05-18T02:55:48Z"},{"alias_kind":"arxiv_version","alias_value":"1301.1224v2","created_at":"2026-05-18T02:55:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.1224","created_at":"2026-05-18T02:55:48Z"},{"alias_kind":"pith_short_12","alias_value":"AVJYJGHTKNOQ","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_16","alias_value":"AVJYJGHTKNOQ55G7","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_8","alias_value":"AVJYJGHT","created_at":"2026-05-18T12:27:38Z"}],"graph_snapshots":[{"event_id":"sha256:af0a67d5a448b0373fb2a941f0545158872f9c2af5bbef8dc7006c79105bf088","target":"graph","created_at":"2026-05-18T02:55:48Z","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":"The dynamics of scalar fields as dark energy is well approximated by some general relations between the equation of state parameter $w(z)$ and the fraction energy density $\\Omega_\\phi$. Based on the approximation, for slowly-rolling scalar fields, we derived the analytical expressions of $w(z)$ which reduce to the popular Chevallier-Polarski-Linder parametrization with explicit degeneracy relation between $w_0$ and $w_a$. The models approximate the dynamics of scalar fields well and help eliminate the degeneracies among $w_a$, $w_0$ and $\\Omega_{m0}$. With the explicit degeneracy relations, we","authors_text":"Qing Gao, Yungui Gong","cross_cats":["gr-qc","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-01-07T15:12:29Z","title":"On the effect of the degeneracy between w_0 and w_a"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.1224","kind":"arxiv","version":2},"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":"sha256:6b581b96a931cb44b27a8d4881939e7598f447e5fa2e2ae4e2c65ae840114258","target":"record","created_at":"2026-05-18T02:55:48Z","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":"f0e9aeb8818b5a9a20a03e694211aa437f347d8c7db37382ee4b7228fc187e32","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-01-07T15:12:29Z","title_canon_sha256":"b40a7d82cf5be9db2baeb241f2ebd8d6dba74d1ace80c4506594cb1686c90fe1"},"schema_version":"1.0","source":{"id":"1301.1224","kind":"arxiv","version":2}},"canonical_sha256":"05538498f3535d0ef4dfb8daf90963e807823bcd992933e7c72246737db5b82c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"05538498f3535d0ef4dfb8daf90963e807823bcd992933e7c72246737db5b82c","first_computed_at":"2026-05-18T02:55:48.591470Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:55:48.591470Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"i5ndtn1V7puE6Bs/kFw0n52xJPl4Kfy0orE1lnSIkoNUfqshX5+s3Ixy+o8CBNkmdYZNtrowVA3aOJWtgGXcCA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:55:48.592022Z","signed_message":"canonical_sha256_bytes"},"source_id":"1301.1224","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6b581b96a931cb44b27a8d4881939e7598f447e5fa2e2ae4e2c65ae840114258","sha256:af0a67d5a448b0373fb2a941f0545158872f9c2af5bbef8dc7006c79105bf088"],"state_sha256":"0d8f1bd4cb3e25d70571ff34089bef9c5d82470bdba03e554a76339eae581bab"}