04:00
2026-10-07
arxiv.org
artificial-intelligence
Tree Navigation Without LLM Summaries: A Matched-Cost Study of Hierarchical Retrieval for Long-Document QA
A new arXiv paper (arXiv:2610.06902v1) introduces NavTree, a leaves-only hierarchical retriever that builds a deterministic balanced segment tree over document chunks with zero language-model calls at…