Author

Yang Zhang

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#artificial intelligence Preprint Oct 2026

TopoGraphRAG-Bench: Evaluating Multimodal GraphRAG on Layout-Grounded Evidence Reasoning

Real-world documents distribute evidence across text, tables, figures, and captions within complex page layouts. Answering complex questions over such documents therefore requires more than retrieving relevant passages: systems must recover the evidence topology that connects heterogeneous evidence units. Existing Grap...

Ruo-Chi Li, Jian-Zhe Lin, Haoxuan Zhang et al. · 0 citations

Preprint Aug 2026

Lexical Perturbations Disrupt LLM Reasoning: An Empirical Study of Attention Diversion

Attention Diversion explains why inference-time strategies, including chain-of-thought prompting, spell-checking, self-repair, and stronger repair models, fail to consistently recover performance: each addresses one channel at a time.

Jiaqi Zhu, Yang Zhang, Jun-Hua Ding et al. · 0 citations