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Improved Convergence Rates for Non-Convex Federated Learning with Compression

Dec 12, 2020
Rudrajit Das, Abolfazl Hashemi, Sujay Sanghavi, Inderjit S. Dhillon


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On the Benefits of Multiple Gossip Steps in Communication-Constrained Decentralized Optimization

Nov 20, 2020
Abolfazl Hashemi, Anish Acharya, Rudrajit Das, Haris Vikalo, Sujay Sanghavi, Inderjit Dhillon


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Identifying Low-Dimensional Structures in Markov Chains: A Nonnegative Matrix Factorization Approach

Sep 27, 2019
Mahsa Ghasemi, Abolfazl Hashemi, Haris Vikalo, Ufuk Topcu


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Stochastic-Greedy++: Closing the Optimality Gap in Exact Weak Submodular Maximization

Jul 22, 2019
Gustavo de Veciana, Abolfazl Hashemi, Haris Vikalo


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Evolutionary Self-Expressive Models for Subspace Clustering

Oct 29, 2018
Abolfazl Hashemi, Haris Vikalo

* IEEE Journal of Selected Topics in Signal Processing, Special Issue on Data Science: Robust Subspace Learning and Tracking, vol. 12, no. 6, December 2018 

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Sampling Requirements and Accelerated Schemes for Sparse Linear Regression with Orthogonal Least-Squares

Apr 13, 2018
Abolfazl Hashemi, Haris Vikalo


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Sampling and Reconstruction of Graph Signals via Weak Submodularity and Semidefinite Relaxation

Oct 31, 2017
Abolfazl Hashemi, Rasoul Shafipour, Haris Vikalo, Gonzalo Mateos


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Accelerated Sparse Subspace Clustering

Oct 31, 2017
Abolfazl Hashemi, Haris Vikalo


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Sparse recovery via Orthogonal Least-Squares under presence of Noise

Aug 08, 2016
Abolfazl Hashemi, Haris Vikalo


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Sparse Linear Regression via Generalized Orthogonal Least-Squares

Jul 28, 2016
Abolfazl Hashemi, Haris Vikalo


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