{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:67DQDHD3XIPDNZNLZACXJVMLCR","short_pith_number":"pith:67DQDHD3","canonical_record":{"source":{"id":"2211.15743","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.IR","submitted_at":"2022-11-28T19:49:02Z","cross_cats_sorted":["math.ST","stat.TH"],"title_canon_sha256":"d790b892c53a0a1af54b5661b96c706247a4cdb5b071336c28ec6007ed443b26","abstract_canon_sha256":"d62a8095be9f9a095f89f5730fadeb9590f348733b0c8885cc3d96aed2f33998"},"schema_version":"1.0"},"canonical_sha256":"f7c7019c7bba1e36e5abc80574d58b1443f0626660028f6c86afe44394123e50","source":{"kind":"arxiv","id":"2211.15743","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2211.15743","created_at":"2026-07-05T06:59:28Z"},{"alias_kind":"arxiv_version","alias_value":"2211.15743v3","created_at":"2026-07-05T06:59:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2211.15743","created_at":"2026-07-05T06:59:28Z"},{"alias_kind":"pith_short_12","alias_value":"67DQDHD3XIPD","created_at":"2026-07-05T06:59:28Z"},{"alias_kind":"pith_short_16","alias_value":"67DQDHD3XIPDNZNL","created_at":"2026-07-05T06:59:28Z"},{"alias_kind":"pith_short_8","alias_value":"67DQDHD3","created_at":"2026-07-05T06:59:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:67DQDHD3XIPDNZNLZACXJVMLCR","target":"record","payload":{"canonical_record":{"source":{"id":"2211.15743","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.IR","submitted_at":"2022-11-28T19:49:02Z","cross_cats_sorted":["math.ST","stat.TH"],"title_canon_sha256":"d790b892c53a0a1af54b5661b96c706247a4cdb5b071336c28ec6007ed443b26","abstract_canon_sha256":"d62a8095be9f9a095f89f5730fadeb9590f348733b0c8885cc3d96aed2f33998"},"schema_version":"1.0"},"canonical_sha256":"f7c7019c7bba1e36e5abc80574d58b1443f0626660028f6c86afe44394123e50","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:59:28.689186Z","signature_b64":"Fi7O8qWFybZticayfwiJvlfqG/OQMtmM9s3HZ2l8L834nle51H57WrBKRpNRiUmJVmfhBMFXGZoqYCw87IZaCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f7c7019c7bba1e36e5abc80574d58b1443f0626660028f6c86afe44394123e50","last_reissued_at":"2026-07-05T06:59:28.688847Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:59:28.688847Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2211.15743","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T06:59:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ssWUBBYPThC4e5hmFJvrzM0IJuW4ZNQRzj6XEWcGJ2SdXJssOuL6K5gB90hIwBemPQqpmT0hR2H4nLn486q3Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T04:09:05.697966Z"},"content_sha256":"8be5fc5f5d844916c929aeafdfd547c9715b3003de40b1a96072bc742f98538d","schema_version":"1.0","event_id":"sha256:8be5fc5f5d844916c929aeafdfd547c9715b3003de40b1a96072bc742f98538d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:67DQDHD3XIPDNZNLZACXJVMLCR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Towards Reliable Item Sampling for Recommendation Evaluation","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["math.ST","stat.TH"],"primary_cat":"cs.IR","authors_text":"Bin Ren, Dong Li, Jing Gao, Ruoming Jin, Zhenming Liu, Zhi Liu","submitted_at":"2022-11-28T19:49:02Z","abstract_excerpt":"Since Rendle and Krichene argued that commonly used sampling-based evaluation metrics are \"inconsistent\" with respect to the global metrics (even in expectation), there have been a few studies on the sampling-based recommender system evaluation. Existing methods try either mapping the sampling-based metrics to their global counterparts or more generally, learning the empirical rank distribution to estimate the top-$K$ metrics. However, despite existing efforts, there is still a lack of rigorous theoretical understanding of the proposed metric estimators, and the basic item sampling also suffer"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2211.15743","kind":"arxiv","version":3},"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/2211.15743/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":"2026-07-05T06:59:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kQvFwnkvPqMC6NzBh7Wq4OMvQ4cBxk5lNnkWTyzPoRhZ2GXlqiYGsQxReROwBh+WcDtHMjmcQBlRLmqDMTLZCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T04:09:05.698360Z"},"content_sha256":"a71e99953025f95c5228840a403a94e81aa2db06527194f039f050499168c491","schema_version":"1.0","event_id":"sha256:a71e99953025f95c5228840a403a94e81aa2db06527194f039f050499168c491"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/67DQDHD3XIPDNZNLZACXJVMLCR/bundle.json","state_url":"https://pith.science/pith/67DQDHD3XIPDNZNLZACXJVMLCR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/67DQDHD3XIPDNZNLZACXJVMLCR/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":"2026-07-07T04:09:05Z","links":{"resolver":"https://pith.science/pith/67DQDHD3XIPDNZNLZACXJVMLCR","bundle":"https://pith.science/pith/67DQDHD3XIPDNZNLZACXJVMLCR/bundle.json","state":"https://pith.science/pith/67DQDHD3XIPDNZNLZACXJVMLCR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/67DQDHD3XIPDNZNLZACXJVMLCR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:67DQDHD3XIPDNZNLZACXJVMLCR","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":"d62a8095be9f9a095f89f5730fadeb9590f348733b0c8885cc3d96aed2f33998","cross_cats_sorted":["math.ST","stat.TH"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.IR","submitted_at":"2022-11-28T19:49:02Z","title_canon_sha256":"d790b892c53a0a1af54b5661b96c706247a4cdb5b071336c28ec6007ed443b26"},"schema_version":"1.0","source":{"id":"2211.15743","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2211.15743","created_at":"2026-07-05T06:59:28Z"},{"alias_kind":"arxiv_version","alias_value":"2211.15743v3","created_at":"2026-07-05T06:59:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2211.15743","created_at":"2026-07-05T06:59:28Z"},{"alias_kind":"pith_short_12","alias_value":"67DQDHD3XIPD","created_at":"2026-07-05T06:59:28Z"},{"alias_kind":"pith_short_16","alias_value":"67DQDHD3XIPDNZNL","created_at":"2026-07-05T06:59:28Z"},{"alias_kind":"pith_short_8","alias_value":"67DQDHD3","created_at":"2026-07-05T06:59:28Z"}],"graph_snapshots":[{"event_id":"sha256:a71e99953025f95c5228840a403a94e81aa2db06527194f039f050499168c491","target":"graph","created_at":"2026-07-05T06:59:28Z","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/2211.15743/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Since Rendle and Krichene argued that commonly used sampling-based evaluation metrics are \"inconsistent\" with respect to the global metrics (even in expectation), there have been a few studies on the sampling-based recommender system evaluation. Existing methods try either mapping the sampling-based metrics to their global counterparts or more generally, learning the empirical rank distribution to estimate the top-$K$ metrics. However, despite existing efforts, there is still a lack of rigorous theoretical understanding of the proposed metric estimators, and the basic item sampling also suffer","authors_text":"Bin Ren, Dong Li, Jing Gao, Ruoming Jin, Zhenming Liu, Zhi Liu","cross_cats":["math.ST","stat.TH"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.IR","submitted_at":"2022-11-28T19:49:02Z","title":"Towards Reliable Item Sampling for Recommendation Evaluation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2211.15743","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":"sha256:8be5fc5f5d844916c929aeafdfd547c9715b3003de40b1a96072bc742f98538d","target":"record","created_at":"2026-07-05T06:59:28Z","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":"d62a8095be9f9a095f89f5730fadeb9590f348733b0c8885cc3d96aed2f33998","cross_cats_sorted":["math.ST","stat.TH"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.IR","submitted_at":"2022-11-28T19:49:02Z","title_canon_sha256":"d790b892c53a0a1af54b5661b96c706247a4cdb5b071336c28ec6007ed443b26"},"schema_version":"1.0","source":{"id":"2211.15743","kind":"arxiv","version":3}},"canonical_sha256":"f7c7019c7bba1e36e5abc80574d58b1443f0626660028f6c86afe44394123e50","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f7c7019c7bba1e36e5abc80574d58b1443f0626660028f6c86afe44394123e50","first_computed_at":"2026-07-05T06:59:28.688847Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:59:28.688847Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Fi7O8qWFybZticayfwiJvlfqG/OQMtmM9s3HZ2l8L834nle51H57WrBKRpNRiUmJVmfhBMFXGZoqYCw87IZaCQ==","signature_status":"signed_v1","signed_at":"2026-07-05T06:59:28.689186Z","signed_message":"canonical_sha256_bytes"},"source_id":"2211.15743","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8be5fc5f5d844916c929aeafdfd547c9715b3003de40b1a96072bc742f98538d","sha256:a71e99953025f95c5228840a403a94e81aa2db06527194f039f050499168c491"],"state_sha256":"1dbe1eb8bd7d512360d8829d09fbbb8f1e3eda09db3b08445b7eeb06fe3fcf3d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jD8IjOKuA1fQ5q4Z1KWsaaXQyS0GNX3+8SOCYbojIADpK5vy4QCUffoMNWOUDKMui9rUnSCOKh2/cwkW/8Q/Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T04:09:05.700433Z","bundle_sha256":"99d21b069899fcc1500ffdb68d27b670ffb23e5fd015f04fc3f11ec8815fc389"}}