Poster
Optimal Robust Learning of Discrete Distributions from Batches
Ayush Jain · Alon Orlitsky
Keywords: [ Trustworthy Machine Learning ] [ Robust Statistics and Machine Learning ] [ Non-parametric Methods ] [ Information Theory and Estimation ]
Many applications, including natural language processing, sensor networks, collaborative filtering, and federated learning, call for estimating discrete distributions from data collected in batches, some of which may be untrustworthy, erroneous, faulty, or even adversarial. Previous estimators for this setting ran in exponential time, and for some regimes required a suboptimal number of batches. We provide the first polynomial-time estimator that is optimal in the number of batches and achieves essentially the best possible estimation accuracy.