{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2023:H4U36PIPAMQGS3ZIJCICWI3VER","short_pith_number":"pith:H4U36PIP","schema_version":"1.0","canonical_sha256":"3f29bf3d0f0320696f2848902b2375246d6452c27005252d1dfc89a2e1d143ce","source":{"kind":"arxiv","id":"2306.04725","version":1},"attestation_state":"computed","paper":{"title":"Nonlinear Evolution of Quadratic Gravity in 3+1 Dimensions","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Aaron Held, Hyun Lim","submitted_at":"2023-06-07T18:41:47Z","abstract_excerpt":"We present a numerically stable system of (3+1) evolution equations for the nonlinear gravitational dynamics of quadratic-curvature corrections to General Relativity (Quadratic Gravity). We also report on the numerical implementation of these evolution equations. We recover a well-known linear instability and gather evidence that -- aside from said instability -- Quadratic Gravity exhibits a physically stable Ricci-flat subsector. In particular, we demonstrate that Teukolsky-wave perturbations of a Schwarzschild black hole as well as a full binary inspiral (evolved up to merger) remain Ricci f"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2306.04725","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2023-06-07T18:41:47Z","cross_cats_sorted":[],"title_canon_sha256":"9aa90e1659109fbad097c95917427f02821de177eca0aec154425150f56cbbbf","abstract_canon_sha256":"6ed56a213f4510581cce20cedbb96995e689c6c0bed00288f040b8acea13b152"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:23:53.869174Z","signature_b64":"F/kZDaGmxUSW8WjJ3r3kCuFm5bOG43h1FO3yDDkDevIIgRNDTCDL47Rkf8Gect2afLzDT75oHgJ1vRcrua5zDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3f29bf3d0f0320696f2848902b2375246d6452c27005252d1dfc89a2e1d143ce","last_reissued_at":"2026-07-05T08:23:53.868717Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:23:53.868717Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Nonlinear Evolution of Quadratic Gravity in 3+1 Dimensions","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Aaron Held, Hyun Lim","submitted_at":"2023-06-07T18:41:47Z","abstract_excerpt":"We present a numerically stable system of (3+1) evolution equations for the nonlinear gravitational dynamics of quadratic-curvature corrections to General Relativity (Quadratic Gravity). We also report on the numerical implementation of these evolution equations. We recover a well-known linear instability and gather evidence that -- aside from said instability -- Quadratic Gravity exhibits a physically stable Ricci-flat subsector. In particular, we demonstrate that Teukolsky-wave perturbations of a Schwarzschild black hole as well as a full binary inspiral (evolved up to merger) remain Ricci f"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2306.04725","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/2306.04725/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2306.04725","created_at":"2026-07-05T08:23:53.868769+00:00"},{"alias_kind":"arxiv_version","alias_value":"2306.04725v1","created_at":"2026-07-05T08:23:53.868769+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2306.04725","created_at":"2026-07-05T08:23:53.868769+00:00"},{"alias_kind":"pith_short_12","alias_value":"H4U36PIPAMQG","created_at":"2026-07-05T08:23:53.868769+00:00"},{"alias_kind":"pith_short_16","alias_value":"H4U36PIPAMQGS3ZI","created_at":"2026-07-05T08:23:53.868769+00:00"},{"alias_kind":"pith_short_8","alias_value":"H4U36PIP","created_at":"2026-07-05T08:23:53.868769+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/H4U36PIPAMQGS3ZIJCICWI3VER","json":"https://pith.science/pith/H4U36PIPAMQGS3ZIJCICWI3VER.json","graph_json":"https://pith.science/api/pith-number/H4U36PIPAMQGS3ZIJCICWI3VER/graph.json","events_json":"https://pith.science/api/pith-number/H4U36PIPAMQGS3ZIJCICWI3VER/events.json","paper":"https://pith.science/paper/H4U36PIP"},"agent_actions":{"view_html":"https://pith.science/pith/H4U36PIPAMQGS3ZIJCICWI3VER","download_json":"https://pith.science/pith/H4U36PIPAMQGS3ZIJCICWI3VER.json","view_paper":"https://pith.science/paper/H4U36PIP","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2306.04725&json=true","fetch_graph":"https://pith.science/api/pith-number/H4U36PIPAMQGS3ZIJCICWI3VER/graph.json","fetch_events":"https://pith.science/api/pith-number/H4U36PIPAMQGS3ZIJCICWI3VER/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/H4U36PIPAMQGS3ZIJCICWI3VER/action/timestamp_anchor","attest_storage":"https://pith.science/pith/H4U36PIPAMQGS3ZIJCICWI3VER/action/storage_attestation","attest_author":"https://pith.science/pith/H4U36PIPAMQGS3ZIJCICWI3VER/action/author_attestation","sign_citation":"https://pith.science/pith/H4U36PIPAMQGS3ZIJCICWI3VER/action/citation_signature","submit_replication":"https://pith.science/pith/H4U36PIPAMQGS3ZIJCICWI3VER/action/replication_record"}},"created_at":"2026-07-05T08:23:53.868769+00:00","updated_at":"2026-07-05T08:23:53.868769+00:00"}