{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2000:7Q4MNLEZQXEZZP4QCZFMVMS7BB","short_pith_number":"pith:7Q4MNLEZ","canonical_record":{"source":{"id":"gr-qc/0009008","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"2000-09-04T15:09:00Z","cross_cats_sorted":["astro-ph"],"title_canon_sha256":"6be438d04ff84bfcecb70fb9f5735ca007cb94ceaf17fc384560b00f76c92227","abstract_canon_sha256":"7349ad70a76a48a58b1f4aa52ea1fadef2184d6d76842105ea619fd35ea227c1"},"schema_version":"1.0"},"canonical_sha256":"fc38c6ac9985c99cbf90164acab25f0842c754959db149176f25704ca7fe0995","source":{"kind":"arxiv","id":"gr-qc/0009008","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"gr-qc/0009008","created_at":"2026-05-18T04:23:00Z"},{"alias_kind":"arxiv_version","alias_value":"gr-qc/0009008v2","created_at":"2026-05-18T04:23:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.gr-qc/0009008","created_at":"2026-05-18T04:23:00Z"},{"alias_kind":"pith_short_12","alias_value":"7Q4MNLEZQXEZ","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"7Q4MNLEZQXEZZP4Q","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"7Q4MNLEZ","created_at":"2026-05-18T12:25:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2000:7Q4MNLEZQXEZZP4QCZFMVMS7BB","target":"record","payload":{"canonical_record":{"source":{"id":"gr-qc/0009008","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"2000-09-04T15:09:00Z","cross_cats_sorted":["astro-ph"],"title_canon_sha256":"6be438d04ff84bfcecb70fb9f5735ca007cb94ceaf17fc384560b00f76c92227","abstract_canon_sha256":"7349ad70a76a48a58b1f4aa52ea1fadef2184d6d76842105ea619fd35ea227c1"},"schema_version":"1.0"},"canonical_sha256":"fc38c6ac9985c99cbf90164acab25f0842c754959db149176f25704ca7fe0995","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:23:00.290732Z","signature_b64":"SIdIzoAZ9bUlvoWOYnuqmPAw9VvMI/k182moyP4EZbaNELg7DJbPyTRAHLrBslOCs2n1PhJ5BX9mgPXSvsSdCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fc38c6ac9985c99cbf90164acab25f0842c754959db149176f25704ca7fe0995","last_reissued_at":"2026-05-18T04:23:00.290034Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:23:00.290034Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"gr-qc/0009008","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:23:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"REi1W66DAmgUr4jrk5lwWvo0Jl8pCNdQ3uAQ7/rkt+rBhOECn/DHrTiVocBV1GVI7usmM0uoyiA8meiA4XiqCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T08:14:18.054022Z"},"content_sha256":"179e2bb0aa32b78d6fb08ffbd626a44a902193f6be3a737e9487481282c9c5c7","schema_version":"1.0","event_id":"sha256:179e2bb0aa32b78d6fb08ffbd626a44a902193f6be3a737e9487481282c9c5c7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2000:7Q4MNLEZQXEZZP4QCZFMVMS7BB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Accelerating Universes with Scaling Dark Matter","license":"","headline":"","cross_cats":["astro-ph"],"primary_cat":"gr-qc","authors_text":"D. Polarski, M. Chevallier","submitted_at":"2000-09-04T15:09:00Z","abstract_excerpt":"Friedmann-Robertson-Walker universes with a presently large fraction of the energy density stored in an $X$-component with $w_X<-1/3$, are considered. We find all the critical points of the system for constant equations of state in that range. We consider further several background quantities that can distinguish the models with different $w_X$ values. Using a simple toy model with a varying equation of state, we show that even a large variation of $w_X$ at small redshifts is very difficult to observe with $d_L(z)$ measurements up to $z\\sim 1$. Therefore, it will require accurate measurements "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/0009008","kind":"arxiv","version":2},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:23:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"T6Q/kq3GsieSaVXwxgQqYIEUaZmknsBw8F+4MtlmlBTGr7I29Mxt1LFFnMx/xn5/XskqJ77yKq+RViRuV6epAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T08:14:18.054642Z"},"content_sha256":"570b2655ee801f28cd7f1eaac036bc2f49b758b4f5a168e7181f128cde035393","schema_version":"1.0","event_id":"sha256:570b2655ee801f28cd7f1eaac036bc2f49b758b4f5a168e7181f128cde035393"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7Q4MNLEZQXEZZP4QCZFMVMS7BB/bundle.json","state_url":"https://pith.science/pith/7Q4MNLEZQXEZZP4QCZFMVMS7BB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7Q4MNLEZQXEZZP4QCZFMVMS7BB/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-28T08:14:18Z","links":{"resolver":"https://pith.science/pith/7Q4MNLEZQXEZZP4QCZFMVMS7BB","bundle":"https://pith.science/pith/7Q4MNLEZQXEZZP4QCZFMVMS7BB/bundle.json","state":"https://pith.science/pith/7Q4MNLEZQXEZZP4QCZFMVMS7BB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7Q4MNLEZQXEZZP4QCZFMVMS7BB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2000:7Q4MNLEZQXEZZP4QCZFMVMS7BB","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":"7349ad70a76a48a58b1f4aa52ea1fadef2184d6d76842105ea619fd35ea227c1","cross_cats_sorted":["astro-ph"],"license":"","primary_cat":"gr-qc","submitted_at":"2000-09-04T15:09:00Z","title_canon_sha256":"6be438d04ff84bfcecb70fb9f5735ca007cb94ceaf17fc384560b00f76c92227"},"schema_version":"1.0","source":{"id":"gr-qc/0009008","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"gr-qc/0009008","created_at":"2026-05-18T04:23:00Z"},{"alias_kind":"arxiv_version","alias_value":"gr-qc/0009008v2","created_at":"2026-05-18T04:23:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.gr-qc/0009008","created_at":"2026-05-18T04:23:00Z"},{"alias_kind":"pith_short_12","alias_value":"7Q4MNLEZQXEZ","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"7Q4MNLEZQXEZZP4Q","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"7Q4MNLEZ","created_at":"2026-05-18T12:25:49Z"}],"graph_snapshots":[{"event_id":"sha256:570b2655ee801f28cd7f1eaac036bc2f49b758b4f5a168e7181f128cde035393","target":"graph","created_at":"2026-05-18T04:23:00Z","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":"Friedmann-Robertson-Walker universes with a presently large fraction of the energy density stored in an $X$-component with $w_X<-1/3$, are considered. We find all the critical points of the system for constant equations of state in that range. We consider further several background quantities that can distinguish the models with different $w_X$ values. Using a simple toy model with a varying equation of state, we show that even a large variation of $w_X$ at small redshifts is very difficult to observe with $d_L(z)$ measurements up to $z\\sim 1$. Therefore, it will require accurate measurements ","authors_text":"D. Polarski, M. Chevallier","cross_cats":["astro-ph"],"headline":"","license":"","primary_cat":"gr-qc","submitted_at":"2000-09-04T15:09:00Z","title":"Accelerating Universes with Scaling Dark Matter"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/0009008","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":"sha256:179e2bb0aa32b78d6fb08ffbd626a44a902193f6be3a737e9487481282c9c5c7","target":"record","created_at":"2026-05-18T04:23:00Z","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":"7349ad70a76a48a58b1f4aa52ea1fadef2184d6d76842105ea619fd35ea227c1","cross_cats_sorted":["astro-ph"],"license":"","primary_cat":"gr-qc","submitted_at":"2000-09-04T15:09:00Z","title_canon_sha256":"6be438d04ff84bfcecb70fb9f5735ca007cb94ceaf17fc384560b00f76c92227"},"schema_version":"1.0","source":{"id":"gr-qc/0009008","kind":"arxiv","version":2}},"canonical_sha256":"fc38c6ac9985c99cbf90164acab25f0842c754959db149176f25704ca7fe0995","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fc38c6ac9985c99cbf90164acab25f0842c754959db149176f25704ca7fe0995","first_computed_at":"2026-05-18T04:23:00.290034Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:23:00.290034Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SIdIzoAZ9bUlvoWOYnuqmPAw9VvMI/k182moyP4EZbaNELg7DJbPyTRAHLrBslOCs2n1PhJ5BX9mgPXSvsSdCg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:23:00.290732Z","signed_message":"canonical_sha256_bytes"},"source_id":"gr-qc/0009008","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:179e2bb0aa32b78d6fb08ffbd626a44a902193f6be3a737e9487481282c9c5c7","sha256:570b2655ee801f28cd7f1eaac036bc2f49b758b4f5a168e7181f128cde035393"],"state_sha256":"6eef9687a26452693369e89e4394049deca066e14d6af79bebdb96f65d4944cd"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bmno3F2JZuQ1wCW2Vrnp7vh0CN8IPlQ4XX3niIcj5IvKAmz8Iq60fCP+u+Zl+oHbcrBFkKVcQPxjdfE4s5h2Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T08:14:18.057475Z","bundle_sha256":"ca2f22049d61b788f0dc54ac030fd4dd9c622ba1313061731a2422235f5b7280"}}