{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:ABRWVTEA62FBJQ2PBS5Z3R3RY5","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":"0652d73c8225637c7b7754b10ed07d8268f20c5464e77ce471135dfb616a0553","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2018-12-26T21:40:17Z","title_canon_sha256":"f99863d17b160b3fe65aa2647fadd992c72ec71f36dbcc316fda1d3ac2b1a706"},"schema_version":"1.0","source":{"id":"1812.10546","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.10546","created_at":"2026-05-17T23:57:20Z"},{"alias_kind":"arxiv_version","alias_value":"1812.10546v1","created_at":"2026-05-17T23:57:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.10546","created_at":"2026-05-17T23:57:20Z"},{"alias_kind":"pith_short_12","alias_value":"ABRWVTEA62FB","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"ABRWVTEA62FBJQ2P","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"ABRWVTEA","created_at":"2026-05-18T12:32:13Z"}],"graph_snapshots":[{"event_id":"sha256:eb50a01b7553bb92ea8c76885dfebf32db2b9f5df31df688e5a5ec98070611b2","target":"graph","created_at":"2026-05-17T23:57:20Z","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"},"paper":{"abstract_excerpt":"Recommender systems are ubiquitous in the domain of e-commerce, used to improve the user experience and to market inventory, thereby increasing revenue for the site. Techniques such as item-based collaborative filtering are used to model users' behavioral interactions with items and make recommendations from items that have similar behavioral patterns. However, there are challenges when applying these techniques on extremely sparse and volatile datasets. On some e-commerce sites, such as eBay, the volatile inventory and minimal structured information about items make it very difficult to aggre","authors_text":"Daniel A. Galron, Jin Chung, Michal Wieja, Paul Wang, Yuri M. Brovman","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2018-12-26T21:40:17Z","title":"Deep Item-based Collaborative Filtering for Sparse Implicit Feedback"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.10546","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":"sha256:508a4aa327d01a232ecbb520568df9ea358b79bc492d0faa1a92c150e7804eca","target":"record","created_at":"2026-05-17T23:57:20Z","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":"0652d73c8225637c7b7754b10ed07d8268f20c5464e77ce471135dfb616a0553","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2018-12-26T21:40:17Z","title_canon_sha256":"f99863d17b160b3fe65aa2647fadd992c72ec71f36dbcc316fda1d3ac2b1a706"},"schema_version":"1.0","source":{"id":"1812.10546","kind":"arxiv","version":1}},"canonical_sha256":"00636acc80f68a14c34f0cbb9dc771c77539d906cb660814cff0f94dc43f5a4a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"00636acc80f68a14c34f0cbb9dc771c77539d906cb660814cff0f94dc43f5a4a","first_computed_at":"2026-05-17T23:57:20.756124Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:57:20.756124Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qxVwZQDjWGywxufvx7tumeVMjpT6M9uf8IvEEBgwQkwRAzxn4YgURODlZAa4eqsiJM/R2PIGTdIp+GIP9f9QCA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:57:20.756786Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.10546","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:508a4aa327d01a232ecbb520568df9ea358b79bc492d0faa1a92c150e7804eca","sha256:eb50a01b7553bb92ea8c76885dfebf32db2b9f5df31df688e5a5ec98070611b2"],"state_sha256":"965b485f3b3943c9d2c498086fbc4e9748933dcf278633efdaca8d7399fb53a6"}