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Author

Sitan Chen

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#artificial intelligence Preprint Oct 2026

Finetuning with Sampling: SFT Learns Better Than You Think

Introducing new capabilities to frontier models has long been the goal of posttraining, which predominantly employs supervised finetuning (SFT) and reinforcement learning (RL) to this end. Conventional wisdom dictates that RL enables strong generalization on new tasks without losing existing capabilities, while SFT is...

Aayush Karan, Si-Tan Chen, Yi-Lun Du · 0 citations
#machine learning Preprint Sep 2026

Blackboard Intelligence Can Surpass Autoregressive on Globally Constrained Problems

Next-token prediction has driven remarkable progress in large language models, yet a growing body of evidence suggests that they can struggle on problems governed by complex global constraints. In this work, we focus on this regime and ask whether some of these limitations arise from the inference interface induced by...

Woosang Jeon, Jaeyeon Kim, S. Kakade et al. · 0 citations
Jul 2026

Online Shadow Tomography Matching the Classical Bounds

The key to the proof is a new framework for quantifying post-measurement damage, based on the quantum Efron-Stein decomposition, which improves all three exponents even in the Offline Shadow Tomography setting.

Si-Tan Chen, R. O'Donnell, Angelos Pelecanos et al. · 2 citations · ⚡1

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