Author

Liu-Yi Chen

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Preprint Oct 2026

Read the Route: Attention-Steered Hypergraph Retrieval for Multi-hop RAG

Graph-based retrieval-augmented generation (GraphRAG) answers multi-hop questions by organizing a corpus into a graph and retrieving along its structure. Existing retrieval methods face two limitations. Diffusion- and similarity-based methods expand retrieval along fixed edge weights or by similarity to the question, w...

Jia-Te Liu, Liu-Yi Chen, Xiao-Fei Yuan et al. · 0 citations

E ! icient Partition-based Approaches for Diversified Top-𝐿 Subgraph Matching

The Partition-based Distance Diversity (PDD) framework is introduced, which partitions the graph and retrieves diverse matches from distant regions and two optimizations are developed: embedding-driven partition ! ltering and densest-based partition selection over a Partition Adjacency Graph.

Liu-Yi Chen, Yucheng Hu, Zheng-Yi Yang et al. · 0 citations