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cs.CL2025
Probability Distributions Computed by Autoregressive Transformers
Andy Yang, Anej Svete, Jiaoda Li +4
Most expressivity results for transformers treat them as language recognizers -- devices that accept or reject strings -- rather than as they are used in practice: as language mode…
cs.CL2025
Characterizing the Expressivity of Fixed-Precision Transformer Language Models
Jiaoda Li, Ryan Cotterell
Transformer-based language models (LMs) have achieved widespread empirical success, but their theoretical expressive power remains only partially understood. In this work, we analy…
cs.LG2025
Unique Hard Attention: A Tale of Two Sides
Selim Jerad, Anej Svete, Jiaoda Li +1
Understanding the expressive power of transformers has recently attracted attention, as it offers insights into their abilities and limitations. Many studies analyze unique hard at…