{"paper":{"title":"Projection and Quantisation: A Unifying View of Learning to Hash, from Random Projections to the RAG Era","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":["cs.AI","cs.CV","cs.LG"],"primary_cat":"cs.IR","authors_text":"Sean Moran","submitted_at":"2025-10-05T09:59:56Z","abstract_excerpt":"Approximate nearest neighbour (ANN) search underpins large-scale retrieval, increasingly within the retrieval-augmented\n  generation pipelines that ground large language models, yet the methods that address it have multiplied across communities\n  until they are seldom read as a single field. We argue they form one field with three design choices, and develop the\n  projection-quantisation-organisation (PQO) lens, under which locality-sensitive hashing, learned binary hashing, deep\n  end-to-end hashing, product quantisation, graph-based indexes, and the binary embeddings of modern vector databas"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2510.04127","kind":"arxiv","version":2},"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/2510.04127/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"}