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Armin Askari

3 accepted papers

2020

Fenchel Lifted Networks: A Lagrange Relaxation of Neural Network Training

AISTATS 2020poster

Despite the recent successes of deep neural networks, the corresponding training problem remains highly non-convex and difficult to optimize. Classes of models have been proposed that introduce greater structure to the objective function at the cost of lifting the dimension of the problem. However,…

2020

Linearly Convergent Frank-Wolfe with Backtracking Line-Search

AISTATS 2020poster

Structured constraints in Machine Learning have recently brought the Frank-Wolfe (FW) family of algorithms back in the spotlight. While the classical FW algorithm has poor local convergence properties, the Away-steps and Pairwise FW variants have emerged as improved variants with faster convergence.…

2020

Naive Feature Selection: Sparsity in Naive Bayes

AISTATS 2020poster

Due to its linear complexity, naive Bayes classification remains an attractive supervised learning method, especially in very large-scale settings. We propose a sparse version of naive Bayes, which can be used for feature selection. This leads to a combinatorial maximum-likelihood problem, for which…