{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:6KFJMQO7NTPMMUROGIRGNJX6JO","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":"c785333739520d383b0bfa9b619ba28df4dd59a04913f5f26194068e34425f90","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-02-22T21:00:43Z","title_canon_sha256":"555e4bdef9d95755298506f547408b51da78a92f01cdc55ede4d60bb775600d5"},"schema_version":"1.0","source":{"id":"astro-ph/0702615","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0702615","created_at":"2026-07-04T17:28:35Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0702615v2","created_at":"2026-07-04T17:28:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0702615","created_at":"2026-07-04T17:28:35Z"},{"alias_kind":"pith_short_12","alias_value":"6KFJMQO7NTPM","created_at":"2026-07-04T17:28:35Z"},{"alias_kind":"pith_short_16","alias_value":"6KFJMQO7NTPMMURO","created_at":"2026-07-04T17:28:35Z"},{"alias_kind":"pith_short_8","alias_value":"6KFJMQO7","created_at":"2026-07-04T17:28:35Z"}],"graph_snapshots":[{"event_id":"sha256:c05dfbeace7e644c97f27a4cdde2a115a297f12fb8482ab0ec33e4544ef414d9","target":"graph","created_at":"2026-07-04T17:28:35Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/astro-ph/0702615/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We use that gravity probes only the total energy momentum tensor to show how this leads to a degeneracy for generalised dark energy models. Because of this degeneracy, Omega_m cannot be measured. We demonstrate this explicitely by showing that the CMB and supernova data is compatible with very large and very small values of Omega_m for a specific family of dark energy models. We also show that for the same reason interacting dark energy is always equivalent to a family of non-interacting models. We argue that it is better to face this degeneracy and to parametrise the actual observables.","authors_text":"Martin Kunz (University of Geneva)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2007-02-22T21:00:43Z","title":"The dark degeneracy: On the number and nature of dark components"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0702615","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:f4802a109cec3a087e64546f3ad0849eb96a6ec0c8b725fe356585ef7930445a","target":"record","created_at":"2026-07-04T17:28:35Z","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":"c785333739520d383b0bfa9b619ba28df4dd59a04913f5f26194068e34425f90","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-02-22T21:00:43Z","title_canon_sha256":"555e4bdef9d95755298506f547408b51da78a92f01cdc55ede4d60bb775600d5"},"schema_version":"1.0","source":{"id":"astro-ph/0702615","kind":"arxiv","version":2}},"canonical_sha256":"f28a9641df6cdec6522e322266a6fe4ba598916c1fd3d4008fdfdfdf28acd0c0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f28a9641df6cdec6522e322266a6fe4ba598916c1fd3d4008fdfdfdf28acd0c0","first_computed_at":"2026-07-04T17:28:35.985779Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:28:35.985779Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aBB0Yigkh8EFroHHhXsLdpcnHuNTOyxlEuFfQCttZKhuFvJx1RCkT6UeicK1iKa7yfJzbQ861EzrFnMTTICLDQ==","signature_status":"signed_v1","signed_at":"2026-07-04T17:28:35.986195Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0702615","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f4802a109cec3a087e64546f3ad0849eb96a6ec0c8b725fe356585ef7930445a","sha256:c05dfbeace7e644c97f27a4cdde2a115a297f12fb8482ab0ec33e4544ef414d9"],"state_sha256":"acdff071c986ec85a835ab7d8862c056943460513c1e06f0e05c8a3c48136b79"}