{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1993:EJL7UBJEGKM3G4OIUPJRWLIWBA","short_pith_number":"pith:EJL7UBJE","canonical_record":{"source":{"id":"gr-qc/9302010","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"1993-02-10T10:29:00Z","cross_cats_sorted":[],"title_canon_sha256":"b25c43fa2c3f7614ec1ac1ebcff047b73a1e82905871d7713e132b2366f78c6e","abstract_canon_sha256":"803ed21df5aaebc0d1cbf968346a671a51c12e67b1a6ce7dfb3bd1b011d5db43"},"schema_version":"1.0"},"canonical_sha256":"2257fa05243299b371c8a3d31b2d160835da25da3137aadce2f1fc2d3844aecd","source":{"kind":"arxiv","id":"gr-qc/9302010","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"gr-qc/9302010","created_at":"2026-07-04T15:55:37Z"},{"alias_kind":"arxiv_version","alias_value":"gr-qc/9302010v1","created_at":"2026-07-04T15:55:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.gr-qc/9302010","created_at":"2026-07-04T15:55:37Z"},{"alias_kind":"pith_short_12","alias_value":"EJL7UBJEGKM3","created_at":"2026-07-04T15:55:37Z"},{"alias_kind":"pith_short_16","alias_value":"EJL7UBJEGKM3G4OI","created_at":"2026-07-04T15:55:37Z"},{"alias_kind":"pith_short_8","alias_value":"EJL7UBJE","created_at":"2026-07-04T15:55:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1993:EJL7UBJEGKM3G4OIUPJRWLIWBA","target":"record","payload":{"canonical_record":{"source":{"id":"gr-qc/9302010","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"1993-02-10T10:29:00Z","cross_cats_sorted":[],"title_canon_sha256":"b25c43fa2c3f7614ec1ac1ebcff047b73a1e82905871d7713e132b2366f78c6e","abstract_canon_sha256":"803ed21df5aaebc0d1cbf968346a671a51c12e67b1a6ce7dfb3bd1b011d5db43"},"schema_version":"1.0"},"canonical_sha256":"2257fa05243299b371c8a3d31b2d160835da25da3137aadce2f1fc2d3844aecd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:55:37.913144Z","signature_b64":"QPDdMGjXt+JaX8xR4Ia+wiKiecy7IkGLCITDeDuBS7xKcCie5And5gbR0tHp/vDVN9b4gvadu/TQKovx8aNiCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2257fa05243299b371c8a3d31b2d160835da25da3137aadce2f1fc2d3844aecd","last_reissued_at":"2026-07-04T15:55:37.912760Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:55:37.912760Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"gr-qc/9302010","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":"2026-07-04T15:55:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+aRGe8qpCWwo9hH38P77pYBPIACZonxqyFr1kSGw1KrbS9dVBWigGSF88mO/ddb9fuXGSBkZVRklCQD+ggI5Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T05:40:05.588377Z"},"content_sha256":"eb2e0b95fad1f75cd24d00056c06b1ed5309f58cccfbdacffc5051ae615ca9e1","schema_version":"1.0","event_id":"sha256:eb2e0b95fad1f75cd24d00056c06b1ed5309f58cccfbdacffc5051ae615ca9e1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1993:EJL7UBJEGKM3G4OIUPJRWLIWBA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Cosmology with Nonminimal Derivative Couplings","license":"","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Luca Amendola (Rome Astronomical Observatory)","submitted_at":"1993-02-10T10:29:00Z","abstract_excerpt":"We study a theory which generalizes the nonminimal coupling of matter to gravity by including derivative couplings. This leads to several interesting new dynamical phenomena in cosmology. In particular, the range of parameters in which inflationary attractors exist is greatly expanded. We also numerically integrate the field equations and draw the phase space of the model in second order approximation. The model introduced here may display different inflationary epochs, generating a non-scale-invariant fluctuation spectrum without the need of two or more fields. Finally, we comment on the bubb"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/9302010","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/gr-qc/9302010/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T15:55:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pRg8HDNK6vurIC5WjYITKM6XCKnBBgz2eo1Kr4oTkOaVKzgICB9ABao3nSHjZc6BE032vq+NK0Gq2iwAO/p8BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T05:40:05.588923Z"},"content_sha256":"ecfe23f1de4abf8670956972d98fe0937f09561d5f63aa3bc4e1b9b2c40fb8d0","schema_version":"1.0","event_id":"sha256:ecfe23f1de4abf8670956972d98fe0937f09561d5f63aa3bc4e1b9b2c40fb8d0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EJL7UBJEGKM3G4OIUPJRWLIWBA/bundle.json","state_url":"https://pith.science/pith/EJL7UBJEGKM3G4OIUPJRWLIWBA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EJL7UBJEGKM3G4OIUPJRWLIWBA/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":"2026-08-21T05:40:05Z","links":{"resolver":"https://pith.science/pith/EJL7UBJEGKM3G4OIUPJRWLIWBA","bundle":"https://pith.science/pith/EJL7UBJEGKM3G4OIUPJRWLIWBA/bundle.json","state":"https://pith.science/pith/EJL7UBJEGKM3G4OIUPJRWLIWBA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EJL7UBJEGKM3G4OIUPJRWLIWBA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1993:EJL7UBJEGKM3G4OIUPJRWLIWBA","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":"803ed21df5aaebc0d1cbf968346a671a51c12e67b1a6ce7dfb3bd1b011d5db43","cross_cats_sorted":[],"license":"","primary_cat":"gr-qc","submitted_at":"1993-02-10T10:29:00Z","title_canon_sha256":"b25c43fa2c3f7614ec1ac1ebcff047b73a1e82905871d7713e132b2366f78c6e"},"schema_version":"1.0","source":{"id":"gr-qc/9302010","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"gr-qc/9302010","created_at":"2026-07-04T15:55:37Z"},{"alias_kind":"arxiv_version","alias_value":"gr-qc/9302010v1","created_at":"2026-07-04T15:55:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.gr-qc/9302010","created_at":"2026-07-04T15:55:37Z"},{"alias_kind":"pith_short_12","alias_value":"EJL7UBJEGKM3","created_at":"2026-07-04T15:55:37Z"},{"alias_kind":"pith_short_16","alias_value":"EJL7UBJEGKM3G4OI","created_at":"2026-07-04T15:55:37Z"},{"alias_kind":"pith_short_8","alias_value":"EJL7UBJE","created_at":"2026-07-04T15:55:37Z"}],"graph_snapshots":[{"event_id":"sha256:ecfe23f1de4abf8670956972d98fe0937f09561d5f63aa3bc4e1b9b2c40fb8d0","target":"graph","created_at":"2026-07-04T15:55:37Z","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/gr-qc/9302010/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We study a theory which generalizes the nonminimal coupling of matter to gravity by including derivative couplings. This leads to several interesting new dynamical phenomena in cosmology. In particular, the range of parameters in which inflationary attractors exist is greatly expanded. We also numerically integrate the field equations and draw the phase space of the model in second order approximation. The model introduced here may display different inflationary epochs, generating a non-scale-invariant fluctuation spectrum without the need of two or more fields. Finally, we comment on the bubb","authors_text":"Luca Amendola (Rome Astronomical Observatory)","cross_cats":[],"headline":"","license":"","primary_cat":"gr-qc","submitted_at":"1993-02-10T10:29:00Z","title":"Cosmology with Nonminimal Derivative Couplings"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/9302010","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:eb2e0b95fad1f75cd24d00056c06b1ed5309f58cccfbdacffc5051ae615ca9e1","target":"record","created_at":"2026-07-04T15:55:37Z","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":"803ed21df5aaebc0d1cbf968346a671a51c12e67b1a6ce7dfb3bd1b011d5db43","cross_cats_sorted":[],"license":"","primary_cat":"gr-qc","submitted_at":"1993-02-10T10:29:00Z","title_canon_sha256":"b25c43fa2c3f7614ec1ac1ebcff047b73a1e82905871d7713e132b2366f78c6e"},"schema_version":"1.0","source":{"id":"gr-qc/9302010","kind":"arxiv","version":1}},"canonical_sha256":"2257fa05243299b371c8a3d31b2d160835da25da3137aadce2f1fc2d3844aecd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2257fa05243299b371c8a3d31b2d160835da25da3137aadce2f1fc2d3844aecd","first_computed_at":"2026-07-04T15:55:37.912760Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:55:37.912760Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QPDdMGjXt+JaX8xR4Ia+wiKiecy7IkGLCITDeDuBS7xKcCie5And5gbR0tHp/vDVN9b4gvadu/TQKovx8aNiCg==","signature_status":"signed_v1","signed_at":"2026-07-04T15:55:37.913144Z","signed_message":"canonical_sha256_bytes"},"source_id":"gr-qc/9302010","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eb2e0b95fad1f75cd24d00056c06b1ed5309f58cccfbdacffc5051ae615ca9e1","sha256:ecfe23f1de4abf8670956972d98fe0937f09561d5f63aa3bc4e1b9b2c40fb8d0"],"state_sha256":"1e4e03c655c24a96b86fcdbf3fe3b16c75be5cf5389595789473579346a9bad9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PlPl3xXnQPPgNNX4sQU1ZQ8YguOaplbRS+u61BJTDNwk88lsJf1d6Un3C0Bqtc6q5l0HUYp8tGGiKnumSg2MDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-21T05:40:05.593447Z","bundle_sha256":"a787ed04fd7b499cc9366e4ccc606c9ef0394e2c8c1333801cf41f0c0cf7fb6a"}}