{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:IKJPKQKTQPMQ436ZTEVIZOVIVO","short_pith_number":"pith:IKJPKQKT","canonical_record":{"source":{"id":"1911.03695","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-11-09T14:15:36Z","cross_cats_sorted":["astro-ph.CO","hep-th"],"title_canon_sha256":"4cc708f718edded31c2b9c9df42a2786b8129d5b8553eefcc659600152b21f45","abstract_canon_sha256":"49191ca0561b8039e2ba31b4f6ece30ffe6dac8dc3e02b7f3a7d040172efbd17"},"schema_version":"1.0"},"canonical_sha256":"4292f5415383d90e6fd9992a8cbaa8abb7fc49c95a5a07687b5677cfbbc1f0f2","source":{"kind":"arxiv","id":"1911.03695","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.03695","created_at":"2026-07-05T01:07:51Z"},{"alias_kind":"arxiv_version","alias_value":"1911.03695v1","created_at":"2026-07-05T01:07:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.03695","created_at":"2026-07-05T01:07:51Z"},{"alias_kind":"pith_short_12","alias_value":"IKJPKQKTQPMQ","created_at":"2026-07-05T01:07:51Z"},{"alias_kind":"pith_short_16","alias_value":"IKJPKQKTQPMQ436Z","created_at":"2026-07-05T01:07:51Z"},{"alias_kind":"pith_short_8","alias_value":"IKJPKQKT","created_at":"2026-07-05T01:07:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:IKJPKQKTQPMQ436ZTEVIZOVIVO","target":"record","payload":{"canonical_record":{"source":{"id":"1911.03695","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-11-09T14:15:36Z","cross_cats_sorted":["astro-ph.CO","hep-th"],"title_canon_sha256":"4cc708f718edded31c2b9c9df42a2786b8129d5b8553eefcc659600152b21f45","abstract_canon_sha256":"49191ca0561b8039e2ba31b4f6ece30ffe6dac8dc3e02b7f3a7d040172efbd17"},"schema_version":"1.0"},"canonical_sha256":"4292f5415383d90e6fd9992a8cbaa8abb7fc49c95a5a07687b5677cfbbc1f0f2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:07:51.269254Z","signature_b64":"bZpHr3NkRz9LR1Y4mZF35XhHnz6SftwqdRnSfpnXjuDVZNLCcxAuB0ZuTc51Yea6jPh1Vfyp/CCUrOcub9f6Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4292f5415383d90e6fd9992a8cbaa8abb7fc49c95a5a07687b5677cfbbc1f0f2","last_reissued_at":"2026-07-05T01:07:51.268760Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:07:51.268760Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1911.03695","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":"2026-07-05T01:07:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1wenSsyvw8XfZnZY6ofPxixSCUMvFXIaQMUp1g0odv5onp5JRAxRYDnS0duFuSCUe+dJChFaXG6ragGPHSZ6BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T08:14:24.551830Z"},"content_sha256":"a79bbe639c6b463f94c6ec1cbb96e94c90bd30b6836f46722835c18c4b77ce0c","schema_version":"1.0","event_id":"sha256:a79bbe639c6b463f94c6ec1cbb96e94c90bd30b6836f46722835c18c4b77ce0c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:IKJPKQKTQPMQ436ZTEVIZOVIVO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Multidimensional gravity with higher derivatives and inflation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","hep-th"],"primary_cat":"gr-qc","authors_text":"Arkady A. Popov, J\\'ulio C. Fabris, Sergey G. Rubin","submitted_at":"2019-11-09T14:15:36Z","abstract_excerpt":"We elaborate on the inflationary model starting from multidimensional Lagrangian and gravity with second-order curvature terms. The effective scalar field is related to the Ricci scalar of extra dimensions. It is shown that the Kretschmann and the Ricci tensor square terms dominate during inflation. The observable values of the spectral index and the tensor-to-scalar ratio are obtained for specific values of the model parameters."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.03695","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/1911.03695/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":"2026-07-05T01:07:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5RcxBK6XFYc5goF7OKtO8BW85Qiym3wCahaYVuS+sm/EAiFWqJRZQ8GK5j0RROfwKSajz1VvfPrzVsATEiq+AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T08:14:24.552309Z"},"content_sha256":"6bcd074c5b05c29ca71b4ea9a0cdf585fd1ba3cd6e901e216b8193d79a192c0b","schema_version":"1.0","event_id":"sha256:6bcd074c5b05c29ca71b4ea9a0cdf585fd1ba3cd6e901e216b8193d79a192c0b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IKJPKQKTQPMQ436ZTEVIZOVIVO/bundle.json","state_url":"https://pith.science/pith/IKJPKQKTQPMQ436ZTEVIZOVIVO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IKJPKQKTQPMQ436ZTEVIZOVIVO/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":"2026-08-14T08:14:24Z","links":{"resolver":"https://pith.science/pith/IKJPKQKTQPMQ436ZTEVIZOVIVO","bundle":"https://pith.science/pith/IKJPKQKTQPMQ436ZTEVIZOVIVO/bundle.json","state":"https://pith.science/pith/IKJPKQKTQPMQ436ZTEVIZOVIVO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IKJPKQKTQPMQ436ZTEVIZOVIVO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:IKJPKQKTQPMQ436ZTEVIZOVIVO","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":"49191ca0561b8039e2ba31b4f6ece30ffe6dac8dc3e02b7f3a7d040172efbd17","cross_cats_sorted":["astro-ph.CO","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-11-09T14:15:36Z","title_canon_sha256":"4cc708f718edded31c2b9c9df42a2786b8129d5b8553eefcc659600152b21f45"},"schema_version":"1.0","source":{"id":"1911.03695","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.03695","created_at":"2026-07-05T01:07:51Z"},{"alias_kind":"arxiv_version","alias_value":"1911.03695v1","created_at":"2026-07-05T01:07:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.03695","created_at":"2026-07-05T01:07:51Z"},{"alias_kind":"pith_short_12","alias_value":"IKJPKQKTQPMQ","created_at":"2026-07-05T01:07:51Z"},{"alias_kind":"pith_short_16","alias_value":"IKJPKQKTQPMQ436Z","created_at":"2026-07-05T01:07:51Z"},{"alias_kind":"pith_short_8","alias_value":"IKJPKQKT","created_at":"2026-07-05T01:07:51Z"}],"graph_snapshots":[{"event_id":"sha256:6bcd074c5b05c29ca71b4ea9a0cdf585fd1ba3cd6e901e216b8193d79a192c0b","target":"graph","created_at":"2026-07-05T01:07:51Z","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/1911.03695/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We elaborate on the inflationary model starting from multidimensional Lagrangian and gravity with second-order curvature terms. The effective scalar field is related to the Ricci scalar of extra dimensions. It is shown that the Kretschmann and the Ricci tensor square terms dominate during inflation. The observable values of the spectral index and the tensor-to-scalar ratio are obtained for specific values of the model parameters.","authors_text":"Arkady A. Popov, J\\'ulio C. Fabris, Sergey G. Rubin","cross_cats":["astro-ph.CO","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-11-09T14:15:36Z","title":"Multidimensional gravity with higher derivatives and inflation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.03695","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:a79bbe639c6b463f94c6ec1cbb96e94c90bd30b6836f46722835c18c4b77ce0c","target":"record","created_at":"2026-07-05T01:07:51Z","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":"49191ca0561b8039e2ba31b4f6ece30ffe6dac8dc3e02b7f3a7d040172efbd17","cross_cats_sorted":["astro-ph.CO","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-11-09T14:15:36Z","title_canon_sha256":"4cc708f718edded31c2b9c9df42a2786b8129d5b8553eefcc659600152b21f45"},"schema_version":"1.0","source":{"id":"1911.03695","kind":"arxiv","version":1}},"canonical_sha256":"4292f5415383d90e6fd9992a8cbaa8abb7fc49c95a5a07687b5677cfbbc1f0f2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4292f5415383d90e6fd9992a8cbaa8abb7fc49c95a5a07687b5677cfbbc1f0f2","first_computed_at":"2026-07-05T01:07:51.268760Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:07:51.268760Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bZpHr3NkRz9LR1Y4mZF35XhHnz6SftwqdRnSfpnXjuDVZNLCcxAuB0ZuTc51Yea6jPh1Vfyp/CCUrOcub9f6Dg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:07:51.269254Z","signed_message":"canonical_sha256_bytes"},"source_id":"1911.03695","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a79bbe639c6b463f94c6ec1cbb96e94c90bd30b6836f46722835c18c4b77ce0c","sha256:6bcd074c5b05c29ca71b4ea9a0cdf585fd1ba3cd6e901e216b8193d79a192c0b"],"state_sha256":"975cbb7c00800a8c6351ede87f26b06c824a1476dc4c523e059d1e96d3371288"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VgGml8XGQrrqkDNe8vkT72jFbCL7/DgqGwNUMi97acgVepzawBB8xeogRYfkf2GLCdNGVSqB2sravGTtflE0Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T08:14:24.556789Z","bundle_sha256":"f1949c12c6044fd5bccf862015fbd5e8cd0dd4fb1ee83ae61a2c0e6bc276eb08"}}