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Xin T. Tong

3 accepted papers

2025

Demystifying the Token Dynamics of Deep Selective State Space Models

ICLR 2025spotlight

Selective state space models (SSM), such as Mamba, have gained prominence for their effectiveness in modeling sequential data. Despite their outstanding empirical performance, a comprehensive theoretical understanding of deep selective SSM remains elusive, hindering their further development and ado…

Cited by 1SourcePDFScholar
2025

Dynamical Properties of Tokens in Self-Attention and Effects of Positional Encoding

NeurIPS 2025poster

This paper investigates the dynamical properties of tokens in pre-trained transformer models and explores their application to improving Transformers. To this end, we analyze the dynamical system governing the continuous-time limit of the pre-trained model and characterize the asymptotic behavior of…

Cited by 0SourceScholar
2022

Sampling in Constrained Domains with Orthogonal-Space Variational Gradient Descent

NeurIPS 2022accept

Sampling methods, as important inference and learning techniques, are typically designed for unconstrained domains. However, constraints are ubiquitous in machine learning problems, such as those on safety, fairness, robustness, and many other properties that must be satisfied to apply sampling resu…