{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:QZRQGAARBCMEGAU6DY2CS2R224","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":"a8b9df7ed74f3ff66b6a536ba169a1a65e6cd3b0ca3bfabf12880e7c35d1123e","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-01-13T15:40:11Z","title_canon_sha256":"a2d4e971e166928832f680f32ade186a4f84c7fb0234cca22a64d4e249c3f398"},"schema_version":"1.0","source":{"id":"1001.2207","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1001.2207","created_at":"2026-05-18T02:09:54Z"},{"alias_kind":"arxiv_version","alias_value":"1001.2207v2","created_at":"2026-05-18T02:09:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1001.2207","created_at":"2026-05-18T02:09:54Z"},{"alias_kind":"pith_short_12","alias_value":"QZRQGAARBCME","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_16","alias_value":"QZRQGAARBCMEGAU6","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_8","alias_value":"QZRQGAAR","created_at":"2026-05-18T12:26:13Z"}],"graph_snapshots":[{"event_id":"sha256:22225c2ad6d68efcdbc990f5d0dc961eff4e340cf9eb1923d5465ba0cf410934","target":"graph","created_at":"2026-05-18T02:09:54Z","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":"We investigate dynamical behavior of the equation of state of dark energy $w_{de}$ by employing the linear-spline method in the region of low redshifts from observational data (SnIa, BAO, CMB and 12 $H(z)$ data). The redshift is binned and $w_{de}$ is approximated by a linear expansion of redshift in each bin. We leave the divided points of redshift bins as free parameters of the model, the best-fitted values of divided points will represent the turning positions of $w_{de}$ where $w_{de}$ changes its evolving direction significantly (if there exist such turnings in our considered region). The","authors_text":"Hong-Bo Zhang, Qiping Su, Rong-Gen Cai","cross_cats":["gr-qc","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-01-13T15:40:11Z","title":"Probing the dynamical behavior of dark energy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1001.2207","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":"sha256:76ea265e646a6a64c6c2b31e0ed867cfb668a964de07edc81cdc24240d010a31","target":"record","created_at":"2026-05-18T02:09:54Z","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":"a8b9df7ed74f3ff66b6a536ba169a1a65e6cd3b0ca3bfabf12880e7c35d1123e","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-01-13T15:40:11Z","title_canon_sha256":"a2d4e971e166928832f680f32ade186a4f84c7fb0234cca22a64d4e249c3f398"},"schema_version":"1.0","source":{"id":"1001.2207","kind":"arxiv","version":2}},"canonical_sha256":"8663030011089843029e1e34296a3ad71f4ee13a90f74fc2bbb13d33058dfe5b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8663030011089843029e1e34296a3ad71f4ee13a90f74fc2bbb13d33058dfe5b","first_computed_at":"2026-05-18T02:09:54.933201Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:09:54.933201Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"en+vR35TlLn+/TqqIFwzSNozsBEDdLW2olkiIPvGp5IWEN6uOZ7pTdKHKwdNIF6yaVUhyB4p9vAzJWXvnkhtBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:09:54.933971Z","signed_message":"canonical_sha256_bytes"},"source_id":"1001.2207","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:76ea265e646a6a64c6c2b31e0ed867cfb668a964de07edc81cdc24240d010a31","sha256:22225c2ad6d68efcdbc990f5d0dc961eff4e340cf9eb1923d5465ba0cf410934"],"state_sha256":"0c39d4be1f10194cabf8620fc230aab51209b3c15476fe31ef655d4fec17ac4e"}