{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:QF4RPZP3CFY6LCTW7ZIDV33RI4","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":"59d50e38c67b9414e2d980c767da156b74676eda295b8ecc2fbd6c8437983deb","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2025-08-16T06:25:18Z","title_canon_sha256":"a91b39cddc2e77aa801ecf3d4aa54e40bc99e16c540738ca766febeedda03015"},"schema_version":"1.0","source":{"id":"2508.11931","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2508.11931","created_at":"2026-06-02T03:04:33Z"},{"alias_kind":"arxiv_version","alias_value":"2508.11931v3","created_at":"2026-06-02T03:04:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2508.11931","created_at":"2026-06-02T03:04:33Z"},{"alias_kind":"pith_short_12","alias_value":"QF4RPZP3CFY6","created_at":"2026-06-02T03:04:33Z"},{"alias_kind":"pith_short_16","alias_value":"QF4RPZP3CFY6LCTW","created_at":"2026-06-02T03:04:33Z"},{"alias_kind":"pith_short_8","alias_value":"QF4RPZP3","created_at":"2026-06-02T03:04:33Z"}],"graph_snapshots":[{"event_id":"sha256:5fcb17d923e579d3044b710a74100d03a7bc42874a4b71c753b9484c9045a5ec","target":"graph","created_at":"2026-06-02T03:04:33Z","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/2508.11931/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present an oracle-efficient, near-optimal algorithm for linear contextual bandits with adversarial losses and stochastic action sets, only requiring a linear optimization oracle for the action sets in each round. Our approach reduces this setting to misspecification-robust adversarial linear bandits with fixed action sets. Without knowledge of the context distribution or access to a context simulator, the algorithm achieves $\\widetilde{\\mathcal{O}}(\\min\\{d^2\\sqrt{T}, \\sqrt{d^3T\\log K}\\})$ regret and runs in $\\mathrm{poly}(d,T)$ time plus $\\mathrm{poly}(d,T)$ calls to the linear optimization","authors_text":"Chen-Yu Wei, Jack Mayo, Julia Olkhovskaya, Tim van Erven","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2025-08-16T06:25:18Z","title":"An Improved Algorithm for Adversarial Linear Contextual Bandits via Reduction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2508.11931","kind":"arxiv","version":3},"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:a44789adb4f13f6df513258b2add192eff22db253643c819aacae5b94906a04a","target":"record","created_at":"2026-06-02T03:04:33Z","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":"59d50e38c67b9414e2d980c767da156b74676eda295b8ecc2fbd6c8437983deb","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2025-08-16T06:25:18Z","title_canon_sha256":"a91b39cddc2e77aa801ecf3d4aa54e40bc99e16c540738ca766febeedda03015"},"schema_version":"1.0","source":{"id":"2508.11931","kind":"arxiv","version":3}},"canonical_sha256":"817917e5fb1171e58a76fe503aef71471c4770473e4e60686e2ac8998a6a5ba0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"817917e5fb1171e58a76fe503aef71471c4770473e4e60686e2ac8998a6a5ba0","first_computed_at":"2026-06-02T03:04:33.839809Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-02T03:04:33.839809Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7U2kaFLYzab1iH4lTHVWiE5LVuozpx6yBNgzjVTj9uiHxYWDnRsr/48pgDzeQCJLVCvBQZzjK4nJ03SobvDFDQ==","signature_status":"signed_v1","signed_at":"2026-06-02T03:04:33.840218Z","signed_message":"canonical_sha256_bytes"},"source_id":"2508.11931","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a44789adb4f13f6df513258b2add192eff22db253643c819aacae5b94906a04a","sha256:5fcb17d923e579d3044b710a74100d03a7bc42874a4b71c753b9484c9045a5ec"],"state_sha256":"54f9905ecde308c6cf89ba2b4b9a911be21299b63a482c25fc7d3e7a8a08db45"}