A hierarchical clustering tree with cosine-similarity centroids can replace top-k retrieval in RAG and improve expert-rated legal answers without tuning k.
u ttler, Mike Lewis, Wen-tau Yih, Tim Rockt\
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Tree-Based Text Retrieval via Hierarchical Clustering in RAGFrameworks: Application on Taiwanese Regulations
A hierarchical clustering tree with cosine-similarity centroids can replace top-k retrieval in RAG and improve expert-rated legal answers without tuning k.