{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:LSCWSZVMMGTJEDFNV2LCA6AAKS","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":"791542ec536dae3076097e8071230c4974c878f50e5f9dcaf54ab1ccf62e69a9","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-01-28T22:30:20Z","title_canon_sha256":"9b782534294d224c02a8e50d5750eae897f959f5161d08291554359e659c7697"},"schema_version":"1.0","source":{"id":"0901.4566","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0901.4566","created_at":"2026-05-18T04:42:03Z"},{"alias_kind":"arxiv_version","alias_value":"0901.4566v2","created_at":"2026-05-18T04:42:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0901.4566","created_at":"2026-05-18T04:42:03Z"},{"alias_kind":"pith_short_12","alias_value":"LSCWSZVMMGTJ","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"LSCWSZVMMGTJEDFN","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"LSCWSZVM","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:cb2032761b14a845b1f6f03a04ecce1b1c2565cb19aa09f2e9128d52c464c2cf","target":"graph","created_at":"2026-05-18T04:42:03Z","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 cosmological backreaction proposal, which attempts to account for observations without a primary dark energy source in the stress-energy tensor, has been developed and discussed by means of different approaches. Here, we focus on the concept of cosmological background solutions in order to develop a framework to study different backreaction proposals.","authors_text":"Edward W. Kolb, Sabino Matarrese, Valerio Marra","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-01-28T22:30:20Z","title":"Cosmological background solutions and cosmological backreactions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0901.4566","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":"sha256:3906db9d4708dbe0570f10c49c840ccfe3b91d281eefcf8b12e8fc01e897c85d","target":"record","created_at":"2026-05-18T04:42:03Z","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":"791542ec536dae3076097e8071230c4974c878f50e5f9dcaf54ab1ccf62e69a9","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-01-28T22:30:20Z","title_canon_sha256":"9b782534294d224c02a8e50d5750eae897f959f5161d08291554359e659c7697"},"schema_version":"1.0","source":{"id":"0901.4566","kind":"arxiv","version":2}},"canonical_sha256":"5c856966ac61a6920cadae9620780054a72183aa0ab8b4b7af35ba3c653a901f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5c856966ac61a6920cadae9620780054a72183aa0ab8b4b7af35ba3c653a901f","first_computed_at":"2026-05-18T04:42:03.479883Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:42:03.479883Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Hxr4cs/rILJdSE8kVVPuy+my3Qjdt3LLMK/05Jvox28jgX5Xc1w3CEM5/3zG+9R5Mv2y2O8lamiN2DgPIojRCw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:42:03.480269Z","signed_message":"canonical_sha256_bytes"},"source_id":"0901.4566","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3906db9d4708dbe0570f10c49c840ccfe3b91d281eefcf8b12e8fc01e897c85d","sha256:cb2032761b14a845b1f6f03a04ecce1b1c2565cb19aa09f2e9128d52c464c2cf"],"state_sha256":"3aed0126059da275b2068e8a133b3f200a79698458572058fbad247da5ce2eba"}