QA19 min read
Tree Navigation Without LLM Summaries: A Matched-Cost Study of Hierarchical Retrieval for Long-Document QA
Retrieval-augmented generation grounds language models in external context, but for long documents flat top-$k$ retrieval can cluster on a single region and miss complementary evidence.
By Priyank Jayraj, Poonam Goyal, Navneet GoyalarXiv - cs.CL (NLP)
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Originally published by arXiv - cs.CL (NLP) on Oct 7, 2026.
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