{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:C63TLBZ22XOPUXKAR5UYICBXCY","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":"2982a9c6bdba8c884c6239c2f81168d3f3e9f84a56fefc1053ea96d57dbf3029","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2026-08-11T12:23:28Z","title_canon_sha256":"854f06753cf466248863d344133128061d4e3360348362cea9ed873ae43992d9"},"schema_version":"1.0","source":{"id":"2608.10850","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.10850","created_at":"2026-08-12T01:23:32Z"},{"alias_kind":"arxiv_version","alias_value":"2608.10850v1","created_at":"2026-08-12T01:23:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.10850","created_at":"2026-08-12T01:23:32Z"},{"alias_kind":"pith_short_12","alias_value":"C63TLBZ22XOP","created_at":"2026-08-12T01:23:32Z"},{"alias_kind":"pith_short_16","alias_value":"C63TLBZ22XOPUXKA","created_at":"2026-08-12T01:23:32Z"},{"alias_kind":"pith_short_8","alias_value":"C63TLBZ2","created_at":"2026-08-12T01:23:32Z"}],"graph_snapshots":[{"event_id":"sha256:51ca58055bb545f55c499244ea737cb3a454980978448fab235fc269809b2eae","target":"graph","created_at":"2026-08-12T01:23:32Z","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/2608.10850/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We study continual pre-training (CPT) as a mechanism for adapting general-purpose large language models to specialized domains: mathematics, instruction, code, and natural text. Using singular value decomposition of weight matrices, we find that CPT leaves singular value spectra largely invariant, with adaptation driven mainly by changes in singular vectors. An analysis of attention-head projection matrices reveals strong, domain-dependent head heterogeneity, which we exploit to define a head importance criterion: up to 60% of head updates can be removed without measurable quality loss. Select","authors_text":"Artem Zabolotnyi, Dmitry Aspisov, Dmitry Vinichenko, Egor Shikov, Maria Krylova, Nikita Borodin, Nikita Tyuplyaev, Oleg Travkin, Roman Alferov","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2026-08-11T12:23:28Z","title":"Diffract: Spectral View of LLM Domain Adaptation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.10850","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":"sha256:32d821e15c8103edd5b265aad93d6f22c0ec8d542c4330d05357228a9d4b1666","target":"record","created_at":"2026-08-12T01:23:32Z","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":"2982a9c6bdba8c884c6239c2f81168d3f3e9f84a56fefc1053ea96d57dbf3029","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2026-08-11T12:23:28Z","title_canon_sha256":"854f06753cf466248863d344133128061d4e3360348362cea9ed873ae43992d9"},"schema_version":"1.0","source":{"id":"2608.10850","kind":"arxiv","version":1}},"canonical_sha256":"17b735873ad5dcfa5d408f698408371602acf3e876aacb78921beaecf366c649","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"17b735873ad5dcfa5d408f698408371602acf3e876aacb78921beaecf366c649","first_computed_at":"2026-08-12T01:23:32.270256Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-08-12T01:23:32.270256Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KNNw6Z2w/FSiXQt6GiYOn1yf4uxfsXcj0s0kHD3nf7UHMKsPEDovPmxYq5WwRL8clbgQJ6kXz0LnCFqa2YCYBw==","signature_status":"signed_v1","signed_at":"2026-08-12T01:23:32.271861Z","signed_message":"canonical_sha256_bytes"},"source_id":"2608.10850","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:32d821e15c8103edd5b265aad93d6f22c0ec8d542c4330d05357228a9d4b1666","sha256:51ca58055bb545f55c499244ea737cb3a454980978448fab235fc269809b2eae"],"state_sha256":"5e2de6e337075899687c7d42e6b06ffe9bccfbd53917f0cc000286fd4f9bd939"}