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Feiyu Xiong

2 papers indexed

arxivcs.AIcs.CL2026-07-14

MemOps: Benchmarking Lifecycle Memory Operations in Long-Horizon Conversations

Xixuan Hao, Zeyu Zhang, Zehao Lin, Yihang Sun, Ziliang Guo, Xichong Zhang, et al.

Long-term memory has become a foundational capability for LLM-based agents that accompany users across extended, multi-session interactions. Existing benchmarks, however, evaluate such memory almost exclusively through downstream question answering, scoring only the correctness o…

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arxivcs.AIcs.CLcs.LG2026-07-09

A First-Principles Theory of Slow Thinking and Active Perception

Hongkang Yang, Zhi-Qin John Xu, Feiyu Xiong, Weinan E

As part of a series on first-principles modeling of cognitive functions, this paper attempts to provide a mathematical formulation of thinking and perception. It formally derives slow thinking or more generally, active perception, and encompasses the design, training and inferenc…

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