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Ori: Drift-Aware Streaming $k$-PCA for Very Low-Rank LLM Training

Luo, Xinyu et al.
arXiv (All) · Papers
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machine-learning
A prominent family of low-rank LLM optimizers, pioneered by GaLore, performs gradient-subspace projection: at each step, they project the gradient into a low-dimensional subspace and map the update back to the full model. Most existing work either recomputes the gradient subspace at certain interval
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