{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:MTVFGRNRO5TBSUFRG3X3JXBJYR","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":"a12dc550270c4f6c68a6097999b7e09348deff1b5f5496566504c8f1a47c6fdf","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"stat.ME","submitted_at":"2026-07-22T09:40:17Z","title_canon_sha256":"3a6d1c4bea7d66108f80afaa13e1f24a51cf53877a4fb49bbd2edec372113585"},"schema_version":"1.0","source":{"id":"2607.19961","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.19961","created_at":"2026-07-23T01:24:52Z"},{"alias_kind":"arxiv_version","alias_value":"2607.19961v1","created_at":"2026-07-23T01:24:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.19961","created_at":"2026-07-23T01:24:52Z"},{"alias_kind":"pith_short_12","alias_value":"MTVFGRNRO5TB","created_at":"2026-07-23T01:24:52Z"},{"alias_kind":"pith_short_16","alias_value":"MTVFGRNRO5TBSUFR","created_at":"2026-07-23T01:24:52Z"},{"alias_kind":"pith_short_8","alias_value":"MTVFGRNR","created_at":"2026-07-23T01:24:52Z"}],"graph_snapshots":[{"event_id":"sha256:00b865e3504d4bcfc9f0314cc483cdebd2ad772db8913a51d6710fa35a961658","target":"graph","created_at":"2026-07-23T01:24:52Z","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/2607.19961/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present an R and Python package for fast online changepoint detection in univariate and multivariate data streams for a variety of models. The package implements the focus family of algorithms, which compute the Generalised Likelihood Ratio test for a single changepoint exactly and efficiently, with a per-iteration cost of approximately $\\log(n)^d$ for a d-dimensional sequence, without introducing approximations. This is achieved by exploiting a connection between the location of the changepoint candidates and the geometry of the data. The package supports a broad range of models from the n","authors_text":"Gaetano Romano, Guillem Rigaill, Idris A. Eckley, Kes Ward, Paul Fearnhead, Vincent Runge, Yuntang Fan","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"stat.ME","submitted_at":"2026-07-22T09:40:17Z","title":"focus and focus-cpt: Fast Online Changepoint Detection in R and Python"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.19961","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":"sha256:5b0a903f206e8fbb0c89546f05b1a9fa15751a87dc2e02c54ef998c387714bef","target":"record","created_at":"2026-07-23T01:24:52Z","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":"a12dc550270c4f6c68a6097999b7e09348deff1b5f5496566504c8f1a47c6fdf","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"stat.ME","submitted_at":"2026-07-22T09:40:17Z","title_canon_sha256":"3a6d1c4bea7d66108f80afaa13e1f24a51cf53877a4fb49bbd2edec372113585"},"schema_version":"1.0","source":{"id":"2607.19961","kind":"arxiv","version":1}},"canonical_sha256":"64ea5345b177661950b136efb4dc29c47bdf67b7cd8a4ea52c753b95be67ec68","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"64ea5345b177661950b136efb4dc29c47bdf67b7cd8a4ea52c753b95be67ec68","first_computed_at":"2026-07-23T01:24:52.251657Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-23T01:24:52.251657Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4V9NdyPy4dvHDp0enDqxPN+jiz8AkCio3vqqs9KwDjaGQIGynJ5uO7VUokzm16vLTFKahs2LE0ia/se/cMDFCw==","signature_status":"signed_v1","signed_at":"2026-07-23T01:24:52.252513Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.19961","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5b0a903f206e8fbb0c89546f05b1a9fa15751a87dc2e02c54ef998c387714bef","sha256:00b865e3504d4bcfc9f0314cc483cdebd2ad772db8913a51d6710fa35a961658"],"state_sha256":"d9e0cdda595b1b32ffcc870630f011ad0dd0c61b54b074eda68844b937e13c25"}