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Local Smoothness in Variance Reduced Optimization
Abstract We propose a family of non-uniform sampling strategies to provably speed up a class of stochastic optimization algorithms with linear convergence including Stochastic Variance Reduced Gradient (SVRG) and Stochastic Dual Coordinate Ascent (SDCA).
Learning Multiple Models via Regularized Weighting
We demonstrate the robustness benefits of our approach with some experimental results and prove for the important case of clustering that our approach has a non-trivial breakdown point, i. e., is guaranteed to be robust to a fixed percentage of adversarial unbounded outliers.
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