{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:HXTUQ2D53XN3WHYOH44OXMLNKP","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":"6a39c0a8aaeae46009da396fad2a6bd4db8206eba3f425d99d5ec16b36fb3936","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-09-16T12:18:05Z","title_canon_sha256":"b3fd03b6896ed339906fa51fa0047c04fada224d7ffa2539cb58189a8b8676e6"},"schema_version":"1.0","source":{"id":"0909.2991","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.2991","created_at":"2026-05-18T04:25:01Z"},{"alias_kind":"arxiv_version","alias_value":"0909.2991v2","created_at":"2026-05-18T04:25:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.2991","created_at":"2026-05-18T04:25:01Z"},{"alias_kind":"pith_short_12","alias_value":"HXTUQ2D53XN3","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_16","alias_value":"HXTUQ2D53XN3WHYO","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_8","alias_value":"HXTUQ2D5","created_at":"2026-05-18T12:25:59Z"}],"graph_snapshots":[{"event_id":"sha256:a49dd42f5d1e3a813e71315bb64453d084525d0014bc8494c9ff957392581c0a","target":"graph","created_at":"2026-05-18T04:25:01Z","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 study a model of $F(R)$ gravity in which a crossing of the phantom divide can be realized. In particular, we demonstrate the behavior of $F(R)$ gravity around a crossing of the phantom divide by taking into account the presence of cold dark matter.","authors_text":"Kazuharu Bamba","cross_cats":["gr-qc","hep-ph","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-09-16T12:18:05Z","title":"Behavior of $F(R)$ gravity around a crossing of the phantom divide"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.2991","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":"sha256:4a65632a4c263011d32529077b2b082b8cf028ec3770302f5b0c9e7e8d4f4aa0","target":"record","created_at":"2026-05-18T04:25:01Z","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":"6a39c0a8aaeae46009da396fad2a6bd4db8206eba3f425d99d5ec16b36fb3936","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-09-16T12:18:05Z","title_canon_sha256":"b3fd03b6896ed339906fa51fa0047c04fada224d7ffa2539cb58189a8b8676e6"},"schema_version":"1.0","source":{"id":"0909.2991","kind":"arxiv","version":2}},"canonical_sha256":"3de748687ddddbbb1f0e3f38ebb16d53ea1505ee79c08b83078a0514c21804fe","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3de748687ddddbbb1f0e3f38ebb16d53ea1505ee79c08b83078a0514c21804fe","first_computed_at":"2026-05-18T04:25:01.853213Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:25:01.853213Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qDjEWrXRxH52Y+K1W/w9yGQvswJ3Q9nGFvrq+/x/hEj68fbMTmS34tcfqKMD+E6NN5inV2ZK+yjgOYY2HKj1Cw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:25:01.853671Z","signed_message":"canonical_sha256_bytes"},"source_id":"0909.2991","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4a65632a4c263011d32529077b2b082b8cf028ec3770302f5b0c9e7e8d4f4aa0","sha256:a49dd42f5d1e3a813e71315bb64453d084525d0014bc8494c9ff957392581c0a"],"state_sha256":"8e68ed7ba33935b6c921b0c60da3735a9f384232a42880135bfdf1e18af7d872"}