Lower Bounds for Linear-Oracle Online Learning
arXiv:2609.38375v1 Announce Type: new Abstract: Can a constant number of linear minimizations per round improve on the $T^{3/4}$ regret rate of online Frank-Wolfe on general convex sets? Weibel et al. conjectured that fixed-coefficient methods cannot. We prove their conjecture and extend the lower…
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- 2026-10-01 04:00 · arXiv stat.ML
Lower Bounds for Linear-Oracle Online Learning