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cs.LG2025
To CoT or To Loop? A Formal Comparison Between Chain-of-Thought and Looped Transformers
Kevin Xu, Issei Sato
Chain-of-Thought (CoT) and Looped Transformers have been shown to empirically improve performance on reasoning tasks and to theoretically enhance expressivity by recursively increa…
cs.LG2024
On Expressive Power of Looped Transformers: Theoretical Analysis and Enhancement via Timestep Encoding
Kevin Xu, Issei Sato
Looped Transformers provide advantages in parameter efficiency, computational capabilities, and generalization for reasoning tasks. However, their expressive power regarding functi…