2 papers
cs.FL2026
When Does Tool Use Increase the Expressive Power of Finite-Precision Recurrent Models?
Nikola ZubiÄ, Qian Li, Yuyi Wang +1
Modern sequence models are increasingly deployed as agents that interleave token generation with calls to external tools. We give an exact, architecture-level account of when such…
cs.LG2026
On the Expressive Power and Limitations of Multi-Layer SSMs
Nikola ZubiÄ, Qian Li, Yuyi Wang +1
We study the expressive power and limitations of multi-layer state-space models (SSMs). First, we show that multi-layer SSMs face fundamental limitations in compositional tasks, re…