{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:2P7DQFG6TUCHGHT7NRQHMENY7E","short_pith_number":"pith:2P7DQFG6","canonical_record":{"source":{"id":"1302.2355","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2013-02-10T19:44:53Z","cross_cats_sorted":[],"title_canon_sha256":"8edf3e1dae83c97a658c0fd7c65779f81f4db4887ceb3212f06c75456b99f29e","abstract_canon_sha256":"54a37ae26aa876a3f895660bab48d94dfa5feaf98cf181e09789bd8e39c971c7"},"schema_version":"1.0"},"canonical_sha256":"d3fe3814de9d04731e7f6c607611b8f92f737edb7e620643c6a0db85a5c40370","source":{"kind":"arxiv","id":"1302.2355","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.2355","created_at":"2026-05-18T01:30:49Z"},{"alias_kind":"arxiv_version","alias_value":"1302.2355v1","created_at":"2026-05-18T01:30:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.2355","created_at":"2026-05-18T01:30:49Z"},{"alias_kind":"pith_short_12","alias_value":"2P7DQFG6TUCH","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"2P7DQFG6TUCHGHT7","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"2P7DQFG6","created_at":"2026-05-18T12:27:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:2P7DQFG6TUCHGHT7NRQHMENY7E","target":"record","payload":{"canonical_record":{"source":{"id":"1302.2355","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2013-02-10T19:44:53Z","cross_cats_sorted":[],"title_canon_sha256":"8edf3e1dae83c97a658c0fd7c65779f81f4db4887ceb3212f06c75456b99f29e","abstract_canon_sha256":"54a37ae26aa876a3f895660bab48d94dfa5feaf98cf181e09789bd8e39c971c7"},"schema_version":"1.0"},"canonical_sha256":"d3fe3814de9d04731e7f6c607611b8f92f737edb7e620643c6a0db85a5c40370","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:30:49.545432Z","signature_b64":"70IS/sJO+CNYJf14kK6Uxoh9OWmdSm/KqUJuDzfH+lovx1NGRNQqeVte2tKKiV2A/j7O1YdaDQh803oCgYZGAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d3fe3814de9d04731e7f6c607611b8f92f737edb7e620643c6a0db85a5c40370","last_reissued_at":"2026-05-18T01:30:49.545015Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:30:49.545015Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1302.2355","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":"2026-05-18T01:30:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gvfDD/PkEofAf3N5dV3R8w6uliagh6AV7eTZCIdggrzwSpKESJi2tjdP6WuK9wC8z3whq7AWWiz24HI7EDomAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T07:13:04.974791Z"},"content_sha256":"cf23f2b9d3bbed605c66d7e2092fa793d8ca283079563e8967237b683b881c51","schema_version":"1.0","event_id":"sha256:cf23f2b9d3bbed605c66d7e2092fa793d8ca283079563e8967237b683b881c51"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:2P7DQFG6TUCHGHT7NRQHMENY7E","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Generalized hybrid metric-Palatini gravity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Christian G. Boehmer, Nicola Tamanini","submitted_at":"2013-02-10T19:44:53Z","abstract_excerpt":"We introduce a new approach to modified gravity which generalizes the recently proposed hybrid metric-Palatini gravity. The gravitational action is taken to depend on a general function of both the metric and Palatini curvature scalars. The dynamical equivalence with a non-minimally coupled bi-scalar field gravitational theory is proved. The evolution of cosmological solutions is studied using dynamical systems techniques."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.2355","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":"2026-05-18T01:30:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mHOvcdu4EUTOIenvTIqX87KPVMisqYE1ne0/UGeKgz3CnHthvH4XP4P9lreRsqiQWcAYiEEPaNH+vCsjWuVmDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T07:13:04.975376Z"},"content_sha256":"3dd2e3dc97a22af5c6c92572ca534c82c6d24ffafe1ede69d6974a1c37a044d2","schema_version":"1.0","event_id":"sha256:3dd2e3dc97a22af5c6c92572ca534c82c6d24ffafe1ede69d6974a1c37a044d2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2P7DQFG6TUCHGHT7NRQHMENY7E/bundle.json","state_url":"https://pith.science/pith/2P7DQFG6TUCHGHT7NRQHMENY7E/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2P7DQFG6TUCHGHT7NRQHMENY7E/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":"2026-06-05T07:13:04Z","links":{"resolver":"https://pith.science/pith/2P7DQFG6TUCHGHT7NRQHMENY7E","bundle":"https://pith.science/pith/2P7DQFG6TUCHGHT7NRQHMENY7E/bundle.json","state":"https://pith.science/pith/2P7DQFG6TUCHGHT7NRQHMENY7E/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2P7DQFG6TUCHGHT7NRQHMENY7E/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:2P7DQFG6TUCHGHT7NRQHMENY7E","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":"54a37ae26aa876a3f895660bab48d94dfa5feaf98cf181e09789bd8e39c971c7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2013-02-10T19:44:53Z","title_canon_sha256":"8edf3e1dae83c97a658c0fd7c65779f81f4db4887ceb3212f06c75456b99f29e"},"schema_version":"1.0","source":{"id":"1302.2355","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.2355","created_at":"2026-05-18T01:30:49Z"},{"alias_kind":"arxiv_version","alias_value":"1302.2355v1","created_at":"2026-05-18T01:30:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.2355","created_at":"2026-05-18T01:30:49Z"},{"alias_kind":"pith_short_12","alias_value":"2P7DQFG6TUCH","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"2P7DQFG6TUCHGHT7","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"2P7DQFG6","created_at":"2026-05-18T12:27:32Z"}],"graph_snapshots":[{"event_id":"sha256:3dd2e3dc97a22af5c6c92572ca534c82c6d24ffafe1ede69d6974a1c37a044d2","target":"graph","created_at":"2026-05-18T01:30:49Z","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"},"paper":{"abstract_excerpt":"We introduce a new approach to modified gravity which generalizes the recently proposed hybrid metric-Palatini gravity. The gravitational action is taken to depend on a general function of both the metric and Palatini curvature scalars. The dynamical equivalence with a non-minimally coupled bi-scalar field gravitational theory is proved. The evolution of cosmological solutions is studied using dynamical systems techniques.","authors_text":"Christian G. Boehmer, Nicola Tamanini","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2013-02-10T19:44:53Z","title":"Generalized hybrid metric-Palatini gravity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.2355","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:cf23f2b9d3bbed605c66d7e2092fa793d8ca283079563e8967237b683b881c51","target":"record","created_at":"2026-05-18T01:30:49Z","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":"54a37ae26aa876a3f895660bab48d94dfa5feaf98cf181e09789bd8e39c971c7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2013-02-10T19:44:53Z","title_canon_sha256":"8edf3e1dae83c97a658c0fd7c65779f81f4db4887ceb3212f06c75456b99f29e"},"schema_version":"1.0","source":{"id":"1302.2355","kind":"arxiv","version":1}},"canonical_sha256":"d3fe3814de9d04731e7f6c607611b8f92f737edb7e620643c6a0db85a5c40370","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d3fe3814de9d04731e7f6c607611b8f92f737edb7e620643c6a0db85a5c40370","first_computed_at":"2026-05-18T01:30:49.545015Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:30:49.545015Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"70IS/sJO+CNYJf14kK6Uxoh9OWmdSm/KqUJuDzfH+lovx1NGRNQqeVte2tKKiV2A/j7O1YdaDQh803oCgYZGAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:30:49.545432Z","signed_message":"canonical_sha256_bytes"},"source_id":"1302.2355","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cf23f2b9d3bbed605c66d7e2092fa793d8ca283079563e8967237b683b881c51","sha256:3dd2e3dc97a22af5c6c92572ca534c82c6d24ffafe1ede69d6974a1c37a044d2"],"state_sha256":"03089ebdfb10890d87f15f7303441d0715100347b50c7d35b7e4c880201eed9d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KGMI310iGSkeX7JBwXjAdVa/Vwjfllr23rH+vlYYaJyzDu6EOa3Z3d7pdKhBcVWI2QBKM+oBgSqw8eGsBJDgAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T07:13:04.978852Z","bundle_sha256":"b202cfe9fb23be1046795ac10ec89c9c78dd2b2ebb2279c69456367cf3f32b30"}}