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URL https://openr","work_id":"5b06efce-068d-4d94-b184-beacaeed4e53","year":2019},{"cited_arxiv_id":"","doi":"10.1609/aaai.v38i14.29451","is_internal_anchor":false,"ref_index":4,"title":"Thakkar, O., Andrew, G., and McMahan, H","work_id":"d25e4851-7365-40a7-86b0-15c7648d26d9","year":1905},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":5,"title":"Linear Term (Descent): E[⟨∇L(θt),∆ t⟩] =E[⟨∇L(θ t),−η t(Pt¯gt +ξ t)⟩](10) =−η t⟨∇L(θt), PtE[¯gt]⟩ −η t⟨∇L(θt),E[ξ t]⟩(11) =−η t∇L(θt)⊤Pt∇L(θt)(SinceE[¯g t] =∇L,E[ξ t] = 0) (12) We use the spectral pro","work_id":"764de8ca-f8ba-49fc-9a1c-c089fdbd46ac","year":null}],"snapshot_sha256":"0d4cfbf83de511dd46a7c7a52895a0ed1dbbdf94a64c496527d7e757701225d7"},"source":{"id":"2605.13418","kind":"arxiv","version":1},"verdict":{"created_at":"2026-05-14T19:43:21.586337Z","id":"cdba0e4f-14d5-4db0-8d3b-4bf2ed71e7ca","model_set":{"reader":"grok-4.3"},"one_line_summary":"DP-KFC approximates the Fisher Information Matrix for KFAC preconditioning via synthetic noise probes and modality frequency statistics, matching private-data performance without consuming privacy budget or introducing distribution shift.","pipeline_version":"pith-pipeline@v0.9.0","pith_extraction_headline":"DP-KFC constructs KFAC preconditioners from synthetic noise and frequency statistics alone.","strongest_claim":"DP-KFC matches private-data preconditioners while public-data variants degrade by up to 4.8%, showing that curvature can be estimated without consuming privacy budget or introducing distribution shift.","weakest_assumption":"The Fisher Information Matrix decouples into architectural sensitivity recoverable via synthetic noise and input correlations approximable from modality-specific frequency statistics."}},"verdict_id":"cdba0e4f-14d5-4db0-8d3b-4bf2ed71e7ca"}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:c9c260c6d8375bc14b9ac4284f92f6813224744c5a925c9ec10f6fcc9b3f6b8e","target":"record","created_at":"2026-05-18T02:44:47Z","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":"185363e865ec7e407106d4e27b3728180945f1f6442be0abc4bea11b7f0c0dd3","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2026-05-13T12:14:00Z","title_canon_sha256":"c8b162731120fd87715fee497add7f3baa41f2db6a10e54af1194844980893cb"},"schema_version":"1.0","source":{"id":"2605.13418","kind":"arxiv","version":1}},"canonical_sha256":"f32ad3f20246b295543a9d652664fee85c31406b237ad59716321f3290e5c1f5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f32ad3f20246b295543a9d652664fee85c31406b237ad59716321f3290e5c1f5","first_computed_at":"2026-05-18T02:44:47.357751Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:44:47.357751Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dEIjOvqoEyH7guQeN9Eu9iMt1IlZrnxhm0WhODF1e0emzr9s456KFnHl7wS6TwX7pC7KNZDV5m5WjDpPAE15BQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:44:47.358190Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.13418","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c9c260c6d8375bc14b9ac4284f92f6813224744c5a925c9ec10f6fcc9b3f6b8e","sha256:bc6b181c24aec72f24a2567617848139dd2000dac19def87e4e6bbeb89a5384c","sha256:8ab86864cba4754f98597abc372ebe44450d59c61af02840cd0df91b0ca68713"],"state_sha256":"80463cb946711379ff42eff2bd0efdc41be49aa67142020a4f814718a56a5785"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cFL0pX5dUJPM+uC/RBYT2kjxZNaOEZEiCrSC9S9r91EG5m1CGSuViqmvQLA/a6vCsaOlgFh8842UZTigZbQPAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-21T05:32:22.355815Z","bundle_sha256":"3d134afa8aaadffe8f68382c179f431f17dc17afe4280773f8b5212e4ab19ecf"}}