Sebastian U Stich
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126
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ML×1Optimization and Control×1Stats ML×1
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2026
What's in a Smoothness Constant? Tighter Rates for Local SGD with Bounded Second-order Heterogeneity
This paper proves the conjecture that Local SGD outperforms Mini-batch SGD under bounded second-order heterogeneity for general convex objectives, improving the convergence guarantee and lower bounds.
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