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#small language model Review Sep 2026

Fine-Tuning Fixes Mode Collapse and Over-Dispersion in LLMs

This work derives a bias-variance decomposition of the expected gap between the model's and target's collision probabilities, showing that SFT is not inherently biased toward mode collapse or its opposite, and shows that diversity miscalibration can arise from finite-sample error and shrink as SFT better approximates t...

K. Skobelev, Eric Fithian, X. Y. Han · 0 citations
#machine learning Preprint Sep 2026

Rank-Efficient LoRA via Joint Tangent-Space Optimization under Isotropic Curvature

Low-Rank Adaptation (LoRA) is an effective approach for adapting large pretrained models by learning low-rank weight updates. In practice, the LoRA rank is used to control an adapter's parameter budget and representational capacity. We show that this view is incomplete: while the nominal rank determines the representat...

Zi-Han Zhu, Zhe-Hang Du, Xu-Yang Chen et al. · 0 citations
#artificial intelligence Preprint Mar 2026

A Comparative Study in Surgical AI: Potential and Limitations of Data, Compute, and Scaling

It is demonstrated that even with multi-billion parameter models and extensive training, current Vision Language Models fall short in the seemingly simple task of tool detection in neurosurgery, and experiments suggest that current models could still face significant obstacles in surgical use cases.

K. Skobelev, Eric Fithian, Yegor Baranovski et al. · 0 citations

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