{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:FNUVWIEU6UOLNX5EAUKN2IZEQP","short_pith_number":"pith:FNUVWIEU","canonical_record":{"source":{"id":"1505.07556","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-05-28T06:23:49Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"b9017a39a5324aab9a2c9e91bf1112b45f6dc517c6889ad12ddf4f242b840d36","abstract_canon_sha256":"225435b471b82619c914cb686c55e22f9118bfa02cdc2e842aa8a709452d3338"},"schema_version":"1.0"},"canonical_sha256":"2b695b2094f51cb6dfa40514dd232483c4e37c98b7eb11115d19ea692ea28734","source":{"kind":"arxiv","id":"1505.07556","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.07556","created_at":"2026-05-18T01:31:38Z"},{"alias_kind":"arxiv_version","alias_value":"1505.07556v1","created_at":"2026-05-18T01:31:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.07556","created_at":"2026-05-18T01:31:38Z"},{"alias_kind":"pith_short_12","alias_value":"FNUVWIEU6UOL","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_16","alias_value":"FNUVWIEU6UOLNX5E","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_8","alias_value":"FNUVWIEU","created_at":"2026-05-18T12:29:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:FNUVWIEU6UOLNX5EAUKN2IZEQP","target":"record","payload":{"canonical_record":{"source":{"id":"1505.07556","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-05-28T06:23:49Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"b9017a39a5324aab9a2c9e91bf1112b45f6dc517c6889ad12ddf4f242b840d36","abstract_canon_sha256":"225435b471b82619c914cb686c55e22f9118bfa02cdc2e842aa8a709452d3338"},"schema_version":"1.0"},"canonical_sha256":"2b695b2094f51cb6dfa40514dd232483c4e37c98b7eb11115d19ea692ea28734","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:31:38.774178Z","signature_b64":"pygtUKI+LhUU/xXeWyZnS+kIPTfgitM/WzahvTF18K2g/EsQy70VphbdTfRKqoXYm02AZTQg5aq/OrW2tiecAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2b695b2094f51cb6dfa40514dd232483c4e37c98b7eb11115d19ea692ea28734","last_reissued_at":"2026-05-18T01:31:38.773693Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:31:38.773693Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1505.07556","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:31:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oDPdomsVZNqS74nt0CZQh5+qSGjWfmcwwDoUeohEnn7yVJIDnMTZOjKvrKAO3GZFx5X3nbrSe1/Ehsj/tr4wBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T16:08:39.841038Z"},"content_sha256":"9aa3cdae4a75871bd351890bcf7e0c11987a4039dfe7bb8c96dab1b2dd95363e","schema_version":"1.0","event_id":"sha256:9aa3cdae4a75871bd351890bcf7e0c11987a4039dfe7bb8c96dab1b2dd95363e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:FNUVWIEU6UOLNX5EAUKN2IZEQP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Scalar-Fluid theories: cosmological perturbations and large-scale structure","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Emmanuel N. Saridakis, Nicola Tamanini, Tomi S. Koivisto","submitted_at":"2015-05-28T06:23:49Z","abstract_excerpt":"Recently a new Lagrangian framework was introduced to describe interactions between scalar fields and relativistic perfect fluids. This allows two consistent generalizations of coupled quintessence models: non-vanishing pressures and a new type of derivative interaction. Here the implications of these to the formation of cosmological large-scale structure are uncovered at the linear order. The full perturbation equations in the two cases are derived in a unified formalism and their Newtonian, quasi-static limit is studied analytically. Requiring the absence of an effective sound speed for the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.07556","kind":"arxiv","version":1},"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":"2026-05-18T01:31:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WhBGft0gYgZHVva9WdVHs5nUuzAyeSoEPLHABRbxN0GVPIs8rxktNpEtA69vrgh1exmvdzXmoikm1XiB77JeAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T16:08:39.841399Z"},"content_sha256":"92c7b4631b5b581fc8f6325621653be165515437147a23dac160b2c9f603eb6e","schema_version":"1.0","event_id":"sha256:92c7b4631b5b581fc8f6325621653be165515437147a23dac160b2c9f603eb6e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FNUVWIEU6UOLNX5EAUKN2IZEQP/bundle.json","state_url":"https://pith.science/pith/FNUVWIEU6UOLNX5EAUKN2IZEQP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FNUVWIEU6UOLNX5EAUKN2IZEQP/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":"2026-05-30T16:08:39Z","links":{"resolver":"https://pith.science/pith/FNUVWIEU6UOLNX5EAUKN2IZEQP","bundle":"https://pith.science/pith/FNUVWIEU6UOLNX5EAUKN2IZEQP/bundle.json","state":"https://pith.science/pith/FNUVWIEU6UOLNX5EAUKN2IZEQP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FNUVWIEU6UOLNX5EAUKN2IZEQP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:FNUVWIEU6UOLNX5EAUKN2IZEQP","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":"225435b471b82619c914cb686c55e22f9118bfa02cdc2e842aa8a709452d3338","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-05-28T06:23:49Z","title_canon_sha256":"b9017a39a5324aab9a2c9e91bf1112b45f6dc517c6889ad12ddf4f242b840d36"},"schema_version":"1.0","source":{"id":"1505.07556","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.07556","created_at":"2026-05-18T01:31:38Z"},{"alias_kind":"arxiv_version","alias_value":"1505.07556v1","created_at":"2026-05-18T01:31:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.07556","created_at":"2026-05-18T01:31:38Z"},{"alias_kind":"pith_short_12","alias_value":"FNUVWIEU6UOL","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_16","alias_value":"FNUVWIEU6UOLNX5E","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_8","alias_value":"FNUVWIEU","created_at":"2026-05-18T12:29:19Z"}],"graph_snapshots":[{"event_id":"sha256:92c7b4631b5b581fc8f6325621653be165515437147a23dac160b2c9f603eb6e","target":"graph","created_at":"2026-05-18T01:31:38Z","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":"Recently a new Lagrangian framework was introduced to describe interactions between scalar fields and relativistic perfect fluids. This allows two consistent generalizations of coupled quintessence models: non-vanishing pressures and a new type of derivative interaction. Here the implications of these to the formation of cosmological large-scale structure are uncovered at the linear order. The full perturbation equations in the two cases are derived in a unified formalism and their Newtonian, quasi-static limit is studied analytically. Requiring the absence of an effective sound speed for the ","authors_text":"Emmanuel N. Saridakis, Nicola Tamanini, Tomi S. Koivisto","cross_cats":["gr-qc","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-05-28T06:23:49Z","title":"Scalar-Fluid theories: cosmological perturbations and large-scale structure"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.07556","kind":"arxiv","version":1},"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":"sha256:9aa3cdae4a75871bd351890bcf7e0c11987a4039dfe7bb8c96dab1b2dd95363e","target":"record","created_at":"2026-05-18T01:31:38Z","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":"225435b471b82619c914cb686c55e22f9118bfa02cdc2e842aa8a709452d3338","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-05-28T06:23:49Z","title_canon_sha256":"b9017a39a5324aab9a2c9e91bf1112b45f6dc517c6889ad12ddf4f242b840d36"},"schema_version":"1.0","source":{"id":"1505.07556","kind":"arxiv","version":1}},"canonical_sha256":"2b695b2094f51cb6dfa40514dd232483c4e37c98b7eb11115d19ea692ea28734","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2b695b2094f51cb6dfa40514dd232483c4e37c98b7eb11115d19ea692ea28734","first_computed_at":"2026-05-18T01:31:38.773693Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:31:38.773693Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pygtUKI+LhUU/xXeWyZnS+kIPTfgitM/WzahvTF18K2g/EsQy70VphbdTfRKqoXYm02AZTQg5aq/OrW2tiecAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:31:38.774178Z","signed_message":"canonical_sha256_bytes"},"source_id":"1505.07556","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9aa3cdae4a75871bd351890bcf7e0c11987a4039dfe7bb8c96dab1b2dd95363e","sha256:92c7b4631b5b581fc8f6325621653be165515437147a23dac160b2c9f603eb6e"],"state_sha256":"fc0eb150e7a1e55b8afe2fca2fee0af1e316407700117c692622f689e919d16f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uf3acm3t+i7vw8NCr/qMJ+Tpw1if+rQsjwquRMmrOcUzG0ti52YFqMhf7BurBotbIGRKtEWpVJ24aVMrXMtzAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T16:08:39.847485Z","bundle_sha256":"8373d19f16a11e7b661ed01203643be9ab8fda867c5ab03951acc4df1874fce2"}}