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Almost surely constrained convex optimization
Olivier Fercoq · Ahmet Alacaoglu · Ion Necoara · Volkan Cevher
We propose a stochastic gradient framework for solving stochastic composite convex optimization problems with (possibly) infinite number of linear inclusion constraints that need to be satisfied almost surely. We use smoothing and homotopy techniques to handle constraints without the need for matrix-valued projections. We show for our stochastic gradient algorithm $\mathcal{O}(\log(k)/\sqrt{k})$ convergence rate for general convex objectives and $\mathcal{O}(\log(k)/k)$ convergence rate for restricted strongly convex objectives.
These rates are known to be optimal up to logarithmic factors, even without constraints.
We demonstrate the performance of our algorithm with numerical experiments on basis pursuit, a hard margin support vector machines and a portfolio optimization and show that our algorithm achieves state-of-the-art practical performance.
Author Information
Olivier Fercoq (Télécom ParisTech, Université Paris-Saclay)
Ahmet Alacaoglu (EPFL)
Ion Necoara (University Bucharest)
Volkan Cevher (EPFL)
Related Events (a corresponding poster, oral, or spotlight)
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2019 Poster: Almost surely constrained convex optimization »
Thu. Jun 13th 01:30 -- 04:00 AM Room Pacific Ballroom #101
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