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math.OC2026
Optimized projection-free algorithms for online learning: construction and worst-case analysis
Julien Weibel, Pierre Gaillard, Wouter M. Koolen +1
This work studies and develop projection-free algorithms for online learning with linear optimization oracles (a.k.a. Frank-Wolfe) for handling the constraint set. More precisely,…
math.OC2025
Accelerated Mirror Descent for Non-Euclidean Star-convex Functions
Clement Lezane, Sophie Langer, Wouter M Koolen
Acceleration for non-convex functions is a fundamental challenge in optimisation. We revisit star-convex functions, which are strictly unimodal on all lines through a minimizer. [1…