{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:WTXAMRC73ZO6Y5OHP77EBVK66B","short_pith_number":"pith:WTXAMRC7","canonical_record":{"source":{"id":"1501.06540","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2015-01-26T19:48:28Z","cross_cats_sorted":["astro-ph.CO","hep-th"],"title_canon_sha256":"7951f3412e2c5f9344911b4b4dbbee59c0d63f6e318eb4a1eb28b846a354dc37","abstract_canon_sha256":"ae45a7dbe2b4d13c2f01c8e22a53323938a6de38aec0703413b057361e14db1e"},"schema_version":"1.0"},"canonical_sha256":"b4ee06445fde5dec75c77ffe40d55ef06a1843834097f25156c213a5dea46727","source":{"kind":"arxiv","id":"1501.06540","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.06540","created_at":"2026-05-18T01:55:42Z"},{"alias_kind":"arxiv_version","alias_value":"1501.06540v2","created_at":"2026-05-18T01:55:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.06540","created_at":"2026-05-18T01:55:42Z"},{"alias_kind":"pith_short_12","alias_value":"WTXAMRC73ZO6","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"WTXAMRC73ZO6Y5OH","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"WTXAMRC7","created_at":"2026-05-18T12:29:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:WTXAMRC73ZO6Y5OHP77EBVK66B","target":"record","payload":{"canonical_record":{"source":{"id":"1501.06540","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2015-01-26T19:48:28Z","cross_cats_sorted":["astro-ph.CO","hep-th"],"title_canon_sha256":"7951f3412e2c5f9344911b4b4dbbee59c0d63f6e318eb4a1eb28b846a354dc37","abstract_canon_sha256":"ae45a7dbe2b4d13c2f01c8e22a53323938a6de38aec0703413b057361e14db1e"},"schema_version":"1.0"},"canonical_sha256":"b4ee06445fde5dec75c77ffe40d55ef06a1843834097f25156c213a5dea46727","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:55:42.271938Z","signature_b64":"jkegM5XYLcrjDopSrEGytKF8vY9UoLmHkTAVW7Ba99Szbl0soHzTbFe5Qx6w0REOAGMtq3RyjDRrcJC5tCzeAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b4ee06445fde5dec75c77ffe40d55ef06a1843834097f25156c213a5dea46727","last_reissued_at":"2026-05-18T01:55:42.271259Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:55:42.271259Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1501.06540","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":"2026-05-18T01:55:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Xv9o3d+dxmkQh1ucAvdmxveIk6meUjQhU9O4jxL/XVGdxR3XpoLDk7j8VhlY2y+Ah/wkzpQiDoKkbj7LVt49CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T07:10:40.875160Z"},"content_sha256":"8e48c553a49f0d9c1fd3269ce50b4c00912eaa1f0c3e565ea6c84ef6798cfe4a","schema_version":"1.0","event_id":"sha256:8e48c553a49f0d9c1fd3269ce50b4c00912eaa1f0c3e565ea6c84ef6798cfe4a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:WTXAMRC73ZO6Y5OHP77EBVK66B","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Interacting quintessence from a variational approach Part I: algebraic couplings","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","hep-th"],"primary_cat":"gr-qc","authors_text":"Christian G. Boehmer, Matthew Wright, Nicola Tamanini","submitted_at":"2015-01-26T19:48:28Z","abstract_excerpt":"We present a new approach to build models of quintessence interacting with dark or baryonic matter. We use a variational approach for relativistic fluids to realize an effective description of matter fields at the Lagrangian level. The coupling is introduced directly in the action by considering a single function mixing the dynamical degrees of freedom of the theory. The resulting gravitational field equations are derived by variations with respect to the independent variables. New interesting phenomenology can be obtained at both small scales, where new screening mechanisms for scalar fields "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.06540","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":"2026-05-18T01:55:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rAfsuvWjy31qUtMR3Vt9arGVWpcsQnZb1AKMR/Xs+nkQnHsLy9dFYNtCkcN56RPe9+XSews+YP8HQKyYxgm8DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T07:10:40.875875Z"},"content_sha256":"3c5d7c5a322ad815f8d711db36828aac5a95703de5d1c0d4fa30bfe7d6425e07","schema_version":"1.0","event_id":"sha256:3c5d7c5a322ad815f8d711db36828aac5a95703de5d1c0d4fa30bfe7d6425e07"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WTXAMRC73ZO6Y5OHP77EBVK66B/bundle.json","state_url":"https://pith.science/pith/WTXAMRC73ZO6Y5OHP77EBVK66B/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WTXAMRC73ZO6Y5OHP77EBVK66B/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":"2026-06-05T07:10:40Z","links":{"resolver":"https://pith.science/pith/WTXAMRC73ZO6Y5OHP77EBVK66B","bundle":"https://pith.science/pith/WTXAMRC73ZO6Y5OHP77EBVK66B/bundle.json","state":"https://pith.science/pith/WTXAMRC73ZO6Y5OHP77EBVK66B/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WTXAMRC73ZO6Y5OHP77EBVK66B/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:WTXAMRC73ZO6Y5OHP77EBVK66B","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":"ae45a7dbe2b4d13c2f01c8e22a53323938a6de38aec0703413b057361e14db1e","cross_cats_sorted":["astro-ph.CO","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2015-01-26T19:48:28Z","title_canon_sha256":"7951f3412e2c5f9344911b4b4dbbee59c0d63f6e318eb4a1eb28b846a354dc37"},"schema_version":"1.0","source":{"id":"1501.06540","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.06540","created_at":"2026-05-18T01:55:42Z"},{"alias_kind":"arxiv_version","alias_value":"1501.06540v2","created_at":"2026-05-18T01:55:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.06540","created_at":"2026-05-18T01:55:42Z"},{"alias_kind":"pith_short_12","alias_value":"WTXAMRC73ZO6","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"WTXAMRC73ZO6Y5OH","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"WTXAMRC7","created_at":"2026-05-18T12:29:47Z"}],"graph_snapshots":[{"event_id":"sha256:3c5d7c5a322ad815f8d711db36828aac5a95703de5d1c0d4fa30bfe7d6425e07","target":"graph","created_at":"2026-05-18T01:55:42Z","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 present a new approach to build models of quintessence interacting with dark or baryonic matter. We use a variational approach for relativistic fluids to realize an effective description of matter fields at the Lagrangian level. The coupling is introduced directly in the action by considering a single function mixing the dynamical degrees of freedom of the theory. The resulting gravitational field equations are derived by variations with respect to the independent variables. New interesting phenomenology can be obtained at both small scales, where new screening mechanisms for scalar fields ","authors_text":"Christian G. Boehmer, Matthew Wright, Nicola Tamanini","cross_cats":["astro-ph.CO","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2015-01-26T19:48:28Z","title":"Interacting quintessence from a variational approach Part I: algebraic couplings"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.06540","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":"sha256:8e48c553a49f0d9c1fd3269ce50b4c00912eaa1f0c3e565ea6c84ef6798cfe4a","target":"record","created_at":"2026-05-18T01:55:42Z","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":"ae45a7dbe2b4d13c2f01c8e22a53323938a6de38aec0703413b057361e14db1e","cross_cats_sorted":["astro-ph.CO","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2015-01-26T19:48:28Z","title_canon_sha256":"7951f3412e2c5f9344911b4b4dbbee59c0d63f6e318eb4a1eb28b846a354dc37"},"schema_version":"1.0","source":{"id":"1501.06540","kind":"arxiv","version":2}},"canonical_sha256":"b4ee06445fde5dec75c77ffe40d55ef06a1843834097f25156c213a5dea46727","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b4ee06445fde5dec75c77ffe40d55ef06a1843834097f25156c213a5dea46727","first_computed_at":"2026-05-18T01:55:42.271259Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:55:42.271259Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jkegM5XYLcrjDopSrEGytKF8vY9UoLmHkTAVW7Ba99Szbl0soHzTbFe5Qx6w0REOAGMtq3RyjDRrcJC5tCzeAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:55:42.271938Z","signed_message":"canonical_sha256_bytes"},"source_id":"1501.06540","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8e48c553a49f0d9c1fd3269ce50b4c00912eaa1f0c3e565ea6c84ef6798cfe4a","sha256:3c5d7c5a322ad815f8d711db36828aac5a95703de5d1c0d4fa30bfe7d6425e07"],"state_sha256":"de3805e131d63c8ebe7663789a2828f1faac9e0a7245910dc0b7811f3a0a70a1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1m547KqF9NQPZEY22Yw+SAw7JWNFUIdDui5bZ6kjOb2TufqBeYonevPDPgw6TQHcdGsAgmEK6gUXqRRtCsk1Ag==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T07:10:40.879384Z","bundle_sha256":"f35bb579283e508be8f5695148695475d0640311dd3e8b9ab578bbb9eeb52042"}}