{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:VDF4PJDEPPPMEI7QGKFIQBEEF4","short_pith_number":"pith:VDF4PJDE","canonical_record":{"source":{"id":"1811.06523","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2018-11-15T18:36:20Z","cross_cats_sorted":["astro-ph.CO","gr-qc"],"title_canon_sha256":"e5a920cdeeed5a85aaff6bcefd569c916a8d9c5f2ca4b932dfb6b6f5e84d3117","abstract_canon_sha256":"5bbc69b03c8e5687fcce38287a25252aea3619cd8bd0e89017621d0c37479fc2"},"schema_version":"1.0"},"canonical_sha256":"a8cbc7a4647bdec223f0328a8804842f2bd7494bc7b7c5c87d0ca4cd874a035d","source":{"kind":"arxiv","id":"1811.06523","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.06523","created_at":"2026-07-05T04:30:49Z"},{"alias_kind":"arxiv_version","alias_value":"1811.06523v2","created_at":"2026-07-05T04:30:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.06523","created_at":"2026-07-05T04:30:49Z"},{"alias_kind":"pith_short_12","alias_value":"VDF4PJDEPPPM","created_at":"2026-07-05T04:30:49Z"},{"alias_kind":"pith_short_16","alias_value":"VDF4PJDEPPPMEI7Q","created_at":"2026-07-05T04:30:49Z"},{"alias_kind":"pith_short_8","alias_value":"VDF4PJDE","created_at":"2026-07-05T04:30:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:VDF4PJDEPPPMEI7QGKFIQBEEF4","target":"record","payload":{"canonical_record":{"source":{"id":"1811.06523","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2018-11-15T18:36:20Z","cross_cats_sorted":["astro-ph.CO","gr-qc"],"title_canon_sha256":"e5a920cdeeed5a85aaff6bcefd569c916a8d9c5f2ca4b932dfb6b6f5e84d3117","abstract_canon_sha256":"5bbc69b03c8e5687fcce38287a25252aea3619cd8bd0e89017621d0c37479fc2"},"schema_version":"1.0"},"canonical_sha256":"a8cbc7a4647bdec223f0328a8804842f2bd7494bc7b7c5c87d0ca4cd874a035d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:30:49.375265Z","signature_b64":"z7OCaTQjVZ0fz3jyZ/TVpmSm7x0VWrxehCHZPtX0vXXPaTCsd4rV/GAgDAxzS+QJ/ckA76JfphImRmyhIG5uCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a8cbc7a4647bdec223f0328a8804842f2bd7494bc7b7c5c87d0ca4cd874a035d","last_reissued_at":"2026-07-05T04:30:49.374924Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:30:49.374924Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1811.06523","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":"2026-07-05T04:30:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1mElPJlJxi0tF8ikdXhO5qwV9t6XnjhoJ5xPk6Y2VkfGn9JWmWU/pLKW00Kyk3aABspBU5sBHtf2NyqCqppaAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T06:59:58.058122Z"},"content_sha256":"8e8345c06e55c84fda00997677e746eee272c50a1cb54ad4b3666d48acbdf53d","schema_version":"1.0","event_id":"sha256:8e8345c06e55c84fda00997677e746eee272c50a1cb54ad4b3666d48acbdf53d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:VDF4PJDEPPPMEI7QGKFIQBEEF4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On four-dimensional Einsteinian gravity, quasitopological gravity, cosmology and black holes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","gr-qc"],"primary_cat":"hep-th","authors_text":"Adolfo Cisterna, Julio Oliva, Nicolas Grandi","submitted_at":"2018-11-15T18:36:20Z","abstract_excerpt":"We show that the combination of cubic invariants defining five-dimensional quasitopological gravity, when written in four dimensions, reduce to the version of four-dimensional Einsteinian gravity recently proposed by Arciniega, Edelstein & Jaime, that produces second order equations of motion in a FLRW ansatz, with a purely geometrical inflationary period. We introduce a quartic version of the four-dimensional Einsteinian theory with similar properties, and study its consequences. In particular we found that there exists a region on the space of parameters which allows for thermodynamically st"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.06523","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1811.06523/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":"2026-07-05T04:30:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1xmYA5C/r74uvwTmDbmzimndo6u8tM5MgpaToCXkYT65Lz+O/qPuqt/EGbNBF/k7tZkwXc86Y5Eb+Xatf8kZAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T06:59:58.058747Z"},"content_sha256":"b314ab416bc266ab5136253e9779658b8d236f5b787191c3a4e5e2bd835d9fbf","schema_version":"1.0","event_id":"sha256:b314ab416bc266ab5136253e9779658b8d236f5b787191c3a4e5e2bd835d9fbf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VDF4PJDEPPPMEI7QGKFIQBEEF4/bundle.json","state_url":"https://pith.science/pith/VDF4PJDEPPPMEI7QGKFIQBEEF4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VDF4PJDEPPPMEI7QGKFIQBEEF4/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":"2026-08-10T06:59:58Z","links":{"resolver":"https://pith.science/pith/VDF4PJDEPPPMEI7QGKFIQBEEF4","bundle":"https://pith.science/pith/VDF4PJDEPPPMEI7QGKFIQBEEF4/bundle.json","state":"https://pith.science/pith/VDF4PJDEPPPMEI7QGKFIQBEEF4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VDF4PJDEPPPMEI7QGKFIQBEEF4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:VDF4PJDEPPPMEI7QGKFIQBEEF4","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":"5bbc69b03c8e5687fcce38287a25252aea3619cd8bd0e89017621d0c37479fc2","cross_cats_sorted":["astro-ph.CO","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2018-11-15T18:36:20Z","title_canon_sha256":"e5a920cdeeed5a85aaff6bcefd569c916a8d9c5f2ca4b932dfb6b6f5e84d3117"},"schema_version":"1.0","source":{"id":"1811.06523","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.06523","created_at":"2026-07-05T04:30:49Z"},{"alias_kind":"arxiv_version","alias_value":"1811.06523v2","created_at":"2026-07-05T04:30:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.06523","created_at":"2026-07-05T04:30:49Z"},{"alias_kind":"pith_short_12","alias_value":"VDF4PJDEPPPM","created_at":"2026-07-05T04:30:49Z"},{"alias_kind":"pith_short_16","alias_value":"VDF4PJDEPPPMEI7Q","created_at":"2026-07-05T04:30:49Z"},{"alias_kind":"pith_short_8","alias_value":"VDF4PJDE","created_at":"2026-07-05T04:30:49Z"}],"graph_snapshots":[{"event_id":"sha256:b314ab416bc266ab5136253e9779658b8d236f5b787191c3a4e5e2bd835d9fbf","target":"graph","created_at":"2026-07-05T04:30:49Z","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/1811.06523/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We show that the combination of cubic invariants defining five-dimensional quasitopological gravity, when written in four dimensions, reduce to the version of four-dimensional Einsteinian gravity recently proposed by Arciniega, Edelstein & Jaime, that produces second order equations of motion in a FLRW ansatz, with a purely geometrical inflationary period. We introduce a quartic version of the four-dimensional Einsteinian theory with similar properties, and study its consequences. In particular we found that there exists a region on the space of parameters which allows for thermodynamically st","authors_text":"Adolfo Cisterna, Julio Oliva, Nicolas Grandi","cross_cats":["astro-ph.CO","gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2018-11-15T18:36:20Z","title":"On four-dimensional Einsteinian gravity, quasitopological gravity, cosmology and black holes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.06523","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":"sha256:8e8345c06e55c84fda00997677e746eee272c50a1cb54ad4b3666d48acbdf53d","target":"record","created_at":"2026-07-05T04:30:49Z","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":"5bbc69b03c8e5687fcce38287a25252aea3619cd8bd0e89017621d0c37479fc2","cross_cats_sorted":["astro-ph.CO","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2018-11-15T18:36:20Z","title_canon_sha256":"e5a920cdeeed5a85aaff6bcefd569c916a8d9c5f2ca4b932dfb6b6f5e84d3117"},"schema_version":"1.0","source":{"id":"1811.06523","kind":"arxiv","version":2}},"canonical_sha256":"a8cbc7a4647bdec223f0328a8804842f2bd7494bc7b7c5c87d0ca4cd874a035d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a8cbc7a4647bdec223f0328a8804842f2bd7494bc7b7c5c87d0ca4cd874a035d","first_computed_at":"2026-07-05T04:30:49.374924Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:30:49.374924Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"z7OCaTQjVZ0fz3jyZ/TVpmSm7x0VWrxehCHZPtX0vXXPaTCsd4rV/GAgDAxzS+QJ/ckA76JfphImRmyhIG5uCA==","signature_status":"signed_v1","signed_at":"2026-07-05T04:30:49.375265Z","signed_message":"canonical_sha256_bytes"},"source_id":"1811.06523","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8e8345c06e55c84fda00997677e746eee272c50a1cb54ad4b3666d48acbdf53d","sha256:b314ab416bc266ab5136253e9779658b8d236f5b787191c3a4e5e2bd835d9fbf"],"state_sha256":"3dfd827d674fe20495a2a10b49844888b2d2d075dd2ee1ddb6f2353f47848a14"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rw8ihg8KuTHzOtEue0vTai/scwuFeowakk9bnY48ozovIrEPya9xdOjCvdZaDNbaRrhvtXGTWbvyRxNQ2QwJDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T06:59:58.063235Z","bundle_sha256":"a0422dcbcf4b19bcfb28d0ea70374f9146411fa8aa8d68daba5bdb4cc351110b"}}