@article{sun2025sapphire,
	title={SAPPHIRE: Preconditioned Stochastic Variance Reduction for Faster Large-Scale Statistical Learning},
	author={Jingruo Sun and Zachary Frangella and Madeleine Udell},
	year={2025},
	eprint={2501.15941},
	archivePrefix={arXiv},
	primaryClass={stat.ML},
	url={https://arxiv.org/abs/2501.15941},
	journal={Major revision at SIAM Journal on Mathematics of Data Science (SIMODS)},
}