{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:BZ2OZTUIJIXGU35XHLNXZGQLK7","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":"e07de187f3e27aa27be11059ea8c79f029ba320cd8bff98db8be58fb201d8124","cross_cats_sorted":["physics.data-an"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2015-10-08T14:50:50Z","title_canon_sha256":"8f9cc5dc7204cd89b3f9d3f2f7369309886c406f438fb56c3ae305066759fe4f"},"schema_version":"1.0","source":{"id":"1510.02348","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.02348","created_at":"2026-05-18T00:52:23Z"},{"alias_kind":"arxiv_version","alias_value":"1510.02348v2","created_at":"2026-05-18T00:52:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.02348","created_at":"2026-05-18T00:52:23Z"},{"alias_kind":"pith_short_12","alias_value":"BZ2OZTUIJIXG","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"BZ2OZTUIJIXGU35X","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"BZ2OZTUI","created_at":"2026-05-18T12:29:14Z"}],"graph_snapshots":[{"event_id":"sha256:87827e9fe827316d8dddaadf40392e48792bbc43c873b5ced1ceb5d5882eddab","target":"graph","created_at":"2026-05-18T00:52:23Z","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 benefit us in tackling the problem of information overload by predicting our potential choices among diverse niche objects. So far, a variety of personalized recommendation algorithms have been proposed and most of them are based on similarities, such as collaborative filtering and mass diffusion. Here, we propose a novel vertex similarity index named CosRA, which combines advantages of both the cosine index and the resource-allocation (RA) index. By applying the CosRA index to real recommender systems including MovieLens, Netflix and RYM, we show that the CosRA-based metho","authors_text":"Jian Gao, Jin-Hu Liu, Ling-Jiao Chen, Tao Zhou, Zi-Ke Zhang","cross_cats":["physics.data-an"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2015-10-08T14:50:50Z","title":"A vertex similarity index for better personalized recommendation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.02348","kind":"arxiv","version":2},"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":"sha256:7a08f32b099bd2dbc9652530dc100db53f83012917995c8cf9c264331034452f","target":"record","created_at":"2026-05-18T00:52:23Z","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":"e07de187f3e27aa27be11059ea8c79f029ba320cd8bff98db8be58fb201d8124","cross_cats_sorted":["physics.data-an"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2015-10-08T14:50:50Z","title_canon_sha256":"8f9cc5dc7204cd89b3f9d3f2f7369309886c406f438fb56c3ae305066759fe4f"},"schema_version":"1.0","source":{"id":"1510.02348","kind":"arxiv","version":2}},"canonical_sha256":"0e74ecce884a2e6a6fb73adb7c9a0b57e3cc25be5994356e8ea8fbb871baf4db","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0e74ecce884a2e6a6fb73adb7c9a0b57e3cc25be5994356e8ea8fbb871baf4db","first_computed_at":"2026-05-18T00:52:23.768178Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:52:23.768178Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"oZli8KB3d96B4Fz1H/FxxVJT7ewdVJaAkFnB2hwrz42tZKWWQ7UgqecsYALdmoYBQVuUMHV94xvoEDQNI9K8Bw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:52:23.768796Z","signed_message":"canonical_sha256_bytes"},"source_id":"1510.02348","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7a08f32b099bd2dbc9652530dc100db53f83012917995c8cf9c264331034452f","sha256:87827e9fe827316d8dddaadf40392e48792bbc43c873b5ced1ceb5d5882eddab"],"state_sha256":"b14ddc7dcf62c5b82e133ed5598486bb53f85e8943d4fd69f37ee271cff48d6a"}