{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:JOOORX5ZXXCHYTMFBSDRJYUPAX","short_pith_number":"pith:JOOORX5Z","canonical_record":{"source":{"id":"1403.1213","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2014-03-05T18:34:09Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"20093fa3c2694782f72bb69d14554322fa5237769d07d3ec6b7e0520edeb7882","abstract_canon_sha256":"ef1102841fb477476d3dce48f3ba24bcdbdffa705fefdfb1143db88994103d11"},"schema_version":"1.0"},"canonical_sha256":"4b9ce8dfb9bdc47c4d850c8714e28f05fcd4b057acb2297504f4ec262493d804","source":{"kind":"arxiv","id":"1403.1213","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1403.1213","created_at":"2026-05-18T01:44:19Z"},{"alias_kind":"arxiv_version","alias_value":"1403.1213v2","created_at":"2026-05-18T01:44:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1403.1213","created_at":"2026-05-18T01:44:19Z"},{"alias_kind":"pith_short_12","alias_value":"JOOORX5ZXXCH","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_16","alias_value":"JOOORX5ZXXCHYTMF","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_8","alias_value":"JOOORX5Z","created_at":"2026-05-18T12:28:35Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:JOOORX5ZXXCHYTMFBSDRJYUPAX","target":"record","payload":{"canonical_record":{"source":{"id":"1403.1213","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2014-03-05T18:34:09Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"20093fa3c2694782f72bb69d14554322fa5237769d07d3ec6b7e0520edeb7882","abstract_canon_sha256":"ef1102841fb477476d3dce48f3ba24bcdbdffa705fefdfb1143db88994103d11"},"schema_version":"1.0"},"canonical_sha256":"4b9ce8dfb9bdc47c4d850c8714e28f05fcd4b057acb2297504f4ec262493d804","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:44:19.439019Z","signature_b64":"BandqH+TegHZyLQK/V4J0pVMAerIvEkXAmE8T/hnftXR9/cYPyYTJN2eal9J1yByJe7+1ZETSEj+et4QGdOYAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4b9ce8dfb9bdc47c4d850c8714e28f05fcd4b057acb2297504f4ec262493d804","last_reissued_at":"2026-05-18T01:44:19.438256Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:44:19.438256Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1403.1213","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":"2026-05-18T01:44:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"slNJJzlp3stPw+w4HhLWiXXocB+K4VmoTFxKw92Gsf0ty+X16Jf3nf4QhUXno7o+FVzo5kqU0OIaA0dR0KOJAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T02:24:08.141250Z"},"content_sha256":"894e74de5f1250cd300155017769d82513d9a4cbaee57c8940af3cdb3ab4e609","schema_version":"1.0","event_id":"sha256:894e74de5f1250cd300155017769d82513d9a4cbaee57c8940af3cdb3ab4e609"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:JOOORX5ZXXCHYTMFBSDRJYUPAX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Material models of dark energy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Jonathan A. Pearson","submitted_at":"2014-03-05T18:34:09Z","abstract_excerpt":"We review and develop a new class of \"dark energy\" models, in which the relativistic theory of solids is used to construct material models of dark energy. These are models which include the effects of a continuous medium with well defined physical properties at the level of linearized perturbations. The formalism is constructed for a medium with arbitrary symmetry, and then specialised to isotropic media (which will be the case of interest for the majority of cosmological applications). We develop the theory of relativistic isotropic viscoelastic media whilst keeping in mind that we ultimately"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1403.1213","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":"2026-05-18T01:44:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TK9HQLK+4oZXy9xRujNmLjxddAq2HvDhzou22XjEfCVbMjbM7vo9Fl/KyQO+fmgMfZrps0ifZsvUI5Fwj7xbBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T02:24:08.141981Z"},"content_sha256":"b2565dc60bd93409e43a7d45d2715489c9e7ac04010daab4a300ab18f094e617","schema_version":"1.0","event_id":"sha256:b2565dc60bd93409e43a7d45d2715489c9e7ac04010daab4a300ab18f094e617"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JOOORX5ZXXCHYTMFBSDRJYUPAX/bundle.json","state_url":"https://pith.science/pith/JOOORX5ZXXCHYTMFBSDRJYUPAX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JOOORX5ZXXCHYTMFBSDRJYUPAX/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":"2026-06-09T02:24:08Z","links":{"resolver":"https://pith.science/pith/JOOORX5ZXXCHYTMFBSDRJYUPAX","bundle":"https://pith.science/pith/JOOORX5ZXXCHYTMFBSDRJYUPAX/bundle.json","state":"https://pith.science/pith/JOOORX5ZXXCHYTMFBSDRJYUPAX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JOOORX5ZXXCHYTMFBSDRJYUPAX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:JOOORX5ZXXCHYTMFBSDRJYUPAX","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":"ef1102841fb477476d3dce48f3ba24bcdbdffa705fefdfb1143db88994103d11","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2014-03-05T18:34:09Z","title_canon_sha256":"20093fa3c2694782f72bb69d14554322fa5237769d07d3ec6b7e0520edeb7882"},"schema_version":"1.0","source":{"id":"1403.1213","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1403.1213","created_at":"2026-05-18T01:44:19Z"},{"alias_kind":"arxiv_version","alias_value":"1403.1213v2","created_at":"2026-05-18T01:44:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1403.1213","created_at":"2026-05-18T01:44:19Z"},{"alias_kind":"pith_short_12","alias_value":"JOOORX5ZXXCH","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_16","alias_value":"JOOORX5ZXXCHYTMF","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_8","alias_value":"JOOORX5Z","created_at":"2026-05-18T12:28:35Z"}],"graph_snapshots":[{"event_id":"sha256:b2565dc60bd93409e43a7d45d2715489c9e7ac04010daab4a300ab18f094e617","target":"graph","created_at":"2026-05-18T01:44:19Z","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 review and develop a new class of \"dark energy\" models, in which the relativistic theory of solids is used to construct material models of dark energy. These are models which include the effects of a continuous medium with well defined physical properties at the level of linearized perturbations. The formalism is constructed for a medium with arbitrary symmetry, and then specialised to isotropic media (which will be the case of interest for the majority of cosmological applications). We develop the theory of relativistic isotropic viscoelastic media whilst keeping in mind that we ultimately","authors_text":"Jonathan A. Pearson","cross_cats":["gr-qc","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2014-03-05T18:34:09Z","title":"Material models of dark energy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1403.1213","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":"sha256:894e74de5f1250cd300155017769d82513d9a4cbaee57c8940af3cdb3ab4e609","target":"record","created_at":"2026-05-18T01:44:19Z","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":"ef1102841fb477476d3dce48f3ba24bcdbdffa705fefdfb1143db88994103d11","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2014-03-05T18:34:09Z","title_canon_sha256":"20093fa3c2694782f72bb69d14554322fa5237769d07d3ec6b7e0520edeb7882"},"schema_version":"1.0","source":{"id":"1403.1213","kind":"arxiv","version":2}},"canonical_sha256":"4b9ce8dfb9bdc47c4d850c8714e28f05fcd4b057acb2297504f4ec262493d804","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4b9ce8dfb9bdc47c4d850c8714e28f05fcd4b057acb2297504f4ec262493d804","first_computed_at":"2026-05-18T01:44:19.438256Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:44:19.438256Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BandqH+TegHZyLQK/V4J0pVMAerIvEkXAmE8T/hnftXR9/cYPyYTJN2eal9J1yByJe7+1ZETSEj+et4QGdOYAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:44:19.439019Z","signed_message":"canonical_sha256_bytes"},"source_id":"1403.1213","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:894e74de5f1250cd300155017769d82513d9a4cbaee57c8940af3cdb3ab4e609","sha256:b2565dc60bd93409e43a7d45d2715489c9e7ac04010daab4a300ab18f094e617"],"state_sha256":"df969151c1097f2fb4b2e2937681b7b196545bde40ecd749948521acb6384963"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sbU9JreKRqvGgYxoV0PBCoQpJe4XDUfjH/+QpFqyoCfWpCv3C5sWu6RO2tvCsg2p2MArndv4jn/00zDktBibCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T02:24:08.145874Z","bundle_sha256":"b3537cacf88fde3ce562eede0b6894fa34dcd469705bfbb4717e9f3dd7e99e68"}}