546 citations · 1.2k across the 35 of their papers we have counts for
Showing 2013Show all
2 papers · 1 filter
stat.ME2013★ 39 cited
Stable Estimation of a Covariance Matrix Guided by Nuclear Norm Penalties
Eric C. Chi, Kenneth Lange
Estimation of covariance matrices or their inverses plays a central role in many statistical methods. For these methods to work reliably, estimated matrices must not only be invert…
stat.ML2013★ 171 cited
Splitting Methods for Convex Clustering
Eric C. Chi, Kenneth Lange
Clustering is a fundamental problem in many scientific applications. Standard methods such as -means, Gaussian mixture models, and hierarchical clustering, however, are beset by…