{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:4PLTEXY6ET3KWB75VIFEA66SRH","short_pith_number":"pith:4PLTEXY6","canonical_record":{"source":{"id":"2502.01867","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2025-02-03T22:33:24Z","cross_cats_sorted":[],"title_canon_sha256":"e3bd0c7a9e7bd78e3925f5b8480270d2e0df4f2f4fc7716e7dfe616831560d99","abstract_canon_sha256":"81c48f4f86f7bdc47511761b80c84e791594e820c9bedb712862c5e7c669b915"},"schema_version":"1.0"},"canonical_sha256":"e3d7325f1e24f6ab07fdaa0a407bd289c87c6e6750feeb00df65be7e458995cf","source":{"kind":"arxiv","id":"2502.01867","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2502.01867","created_at":"2026-07-05T10:09:20Z"},{"alias_kind":"arxiv_version","alias_value":"2502.01867v1","created_at":"2026-07-05T10:09:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.01867","created_at":"2026-07-05T10:09:20Z"},{"alias_kind":"pith_short_12","alias_value":"4PLTEXY6ET3K","created_at":"2026-07-05T10:09:20Z"},{"alias_kind":"pith_short_16","alias_value":"4PLTEXY6ET3KWB75","created_at":"2026-07-05T10:09:20Z"},{"alias_kind":"pith_short_8","alias_value":"4PLTEXY6","created_at":"2026-07-05T10:09:20Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:4PLTEXY6ET3KWB75VIFEA66SRH","target":"record","payload":{"canonical_record":{"source":{"id":"2502.01867","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2025-02-03T22:33:24Z","cross_cats_sorted":[],"title_canon_sha256":"e3bd0c7a9e7bd78e3925f5b8480270d2e0df4f2f4fc7716e7dfe616831560d99","abstract_canon_sha256":"81c48f4f86f7bdc47511761b80c84e791594e820c9bedb712862c5e7c669b915"},"schema_version":"1.0"},"canonical_sha256":"e3d7325f1e24f6ab07fdaa0a407bd289c87c6e6750feeb00df65be7e458995cf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:09:20.494750Z","signature_b64":"6jzrV2HE3LlK7npZBxe11XrkZ71wnbSj4FyHheKLSwRIWjA6trtS2Jl8e65m2VHCdbxqlplVDdjEaMZxPDi5BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e3d7325f1e24f6ab07fdaa0a407bd289c87c6e6750feeb00df65be7e458995cf","last_reissued_at":"2026-07-05T10:09:20.494281Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:09:20.494281Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2502.01867","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T10:09:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"u/aEnMB4/khmbAdt5nRm7E1ZYY7p+oH6uosWtMbtwhqmkakd6ZJJJ1ZXUdY5WtiGMUdsLYpRDnV3aFDAkxFfDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-18T20:54:25.100642Z"},"content_sha256":"c822d497d00f4ee83fa29687035e3101c79a1ea6fa5dba44ec5dad903e34d053","schema_version":"1.0","event_id":"sha256:c822d497d00f4ee83fa29687035e3101c79a1ea6fa5dba44ec5dad903e34d053"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:4PLTEXY6ET3KWB75VIFEA66SRH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optimizing Online Advertising with Multi-Armed Bandits: Mitigating the Cold Start Problem under Auction Dynamics","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cs.LG","authors_text":"Alina Babenko, Anastasiia Soboleva, Andrey Pudovikov, Egor Samosvat, Roman Snetkov, Yuriy Dorn","submitted_at":"2025-02-03T22:33:24Z","abstract_excerpt":"Online advertising platforms often face a common challenge: the cold start problem. Insufficient behavioral data (clicks) makes accurate click-through rate (CTR) forecasting of new ads challenging. CTR for \"old\" items can also be significantly underestimated due to their early performance influencing their long-term behavior on the platform.\n  The cold start problem has far-reaching implications for businesses, including missed long-term revenue opportunities. To mitigate this issue, we developed a UCB-like algorithm under multi-armed bandit (MAB) setting for positional-based model (PBM), spec"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.01867","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/2502.01867/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T10:09:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YIRQu0T4IFsGhtKwn4Li66Wu+up+oqyrWWSREp1yez2ui4YSSK1HIV//c/IrZu+aE2p5WoQYqgriNgsysQItAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-18T20:54:25.101010Z"},"content_sha256":"02411086cf692cbd3c4e04b11215b8493aad342a0cd8da47bb81308029d46c91","schema_version":"1.0","event_id":"sha256:02411086cf692cbd3c4e04b11215b8493aad342a0cd8da47bb81308029d46c91"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4PLTEXY6ET3KWB75VIFEA66SRH/bundle.json","state_url":"https://pith.science/pith/4PLTEXY6ET3KWB75VIFEA66SRH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4PLTEXY6ET3KWB75VIFEA66SRH/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-07-18T20:54:25Z","links":{"resolver":"https://pith.science/pith/4PLTEXY6ET3KWB75VIFEA66SRH","bundle":"https://pith.science/pith/4PLTEXY6ET3KWB75VIFEA66SRH/bundle.json","state":"https://pith.science/pith/4PLTEXY6ET3KWB75VIFEA66SRH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4PLTEXY6ET3KWB75VIFEA66SRH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:4PLTEXY6ET3KWB75VIFEA66SRH","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":"81c48f4f86f7bdc47511761b80c84e791594e820c9bedb712862c5e7c669b915","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2025-02-03T22:33:24Z","title_canon_sha256":"e3bd0c7a9e7bd78e3925f5b8480270d2e0df4f2f4fc7716e7dfe616831560d99"},"schema_version":"1.0","source":{"id":"2502.01867","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2502.01867","created_at":"2026-07-05T10:09:20Z"},{"alias_kind":"arxiv_version","alias_value":"2502.01867v1","created_at":"2026-07-05T10:09:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.01867","created_at":"2026-07-05T10:09:20Z"},{"alias_kind":"pith_short_12","alias_value":"4PLTEXY6ET3K","created_at":"2026-07-05T10:09:20Z"},{"alias_kind":"pith_short_16","alias_value":"4PLTEXY6ET3KWB75","created_at":"2026-07-05T10:09:20Z"},{"alias_kind":"pith_short_8","alias_value":"4PLTEXY6","created_at":"2026-07-05T10:09:20Z"}],"graph_snapshots":[{"event_id":"sha256:02411086cf692cbd3c4e04b11215b8493aad342a0cd8da47bb81308029d46c91","target":"graph","created_at":"2026-07-05T10:09:20Z","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/2502.01867/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Online advertising platforms often face a common challenge: the cold start problem. Insufficient behavioral data (clicks) makes accurate click-through rate (CTR) forecasting of new ads challenging. CTR for \"old\" items can also be significantly underestimated due to their early performance influencing their long-term behavior on the platform.\n  The cold start problem has far-reaching implications for businesses, including missed long-term revenue opportunities. To mitigate this issue, we developed a UCB-like algorithm under multi-armed bandit (MAB) setting for positional-based model (PBM), spec","authors_text":"Alina Babenko, Anastasiia Soboleva, Andrey Pudovikov, Egor Samosvat, Roman Snetkov, Yuriy Dorn","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2025-02-03T22:33:24Z","title":"Optimizing Online Advertising with Multi-Armed Bandits: Mitigating the Cold Start Problem under Auction Dynamics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.01867","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:c822d497d00f4ee83fa29687035e3101c79a1ea6fa5dba44ec5dad903e34d053","target":"record","created_at":"2026-07-05T10:09:20Z","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":"81c48f4f86f7bdc47511761b80c84e791594e820c9bedb712862c5e7c669b915","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2025-02-03T22:33:24Z","title_canon_sha256":"e3bd0c7a9e7bd78e3925f5b8480270d2e0df4f2f4fc7716e7dfe616831560d99"},"schema_version":"1.0","source":{"id":"2502.01867","kind":"arxiv","version":1}},"canonical_sha256":"e3d7325f1e24f6ab07fdaa0a407bd289c87c6e6750feeb00df65be7e458995cf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e3d7325f1e24f6ab07fdaa0a407bd289c87c6e6750feeb00df65be7e458995cf","first_computed_at":"2026-07-05T10:09:20.494281Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:09:20.494281Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6jzrV2HE3LlK7npZBxe11XrkZ71wnbSj4FyHheKLSwRIWjA6trtS2Jl8e65m2VHCdbxqlplVDdjEaMZxPDi5BQ==","signature_status":"signed_v1","signed_at":"2026-07-05T10:09:20.494750Z","signed_message":"canonical_sha256_bytes"},"source_id":"2502.01867","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c822d497d00f4ee83fa29687035e3101c79a1ea6fa5dba44ec5dad903e34d053","sha256:02411086cf692cbd3c4e04b11215b8493aad342a0cd8da47bb81308029d46c91"],"state_sha256":"de206cdd05554748b66f110e9a044eb4f989b5a0b614f62ad504560ee7ee9832"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sfYH12az07uvvWVSe7rILkux8/bjpduaOgTEyQJgFluhHe/EC0DZrDPbErBtdV1D2sUQQvAo0JkmmQSg8BroAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-18T20:54:25.103139Z","bundle_sha256":"4932b6d2799c5e64bc30c4ccea77cb4ad6883fd78d224975263299491d441011"}}