155 citations · 888 across the 24 of their papers we have counts for
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math.OC2013★ 2 cited
A Majorization-Minimization Algorithm for Computing the Karcher Mean of Positive Definite Matrices
Teng Zhang
An algorithm for computing the Karcher mean of positive definite matrices is proposed, based on the majorization-minimization (MM) principle. The proposed MM algorithm is param…
stat.ME2013★ 103 cited
Multivariate Generalized Gaussian Distribution: Convexity and Graphical Models
Teng Zhang, Ami Wiesel, Maria Sabrina Grec
We consider covariance estimation in the multivariate generalized Gaussian distribution (MGGD) and elliptically symmetric (ES) distribution. The maximum likelihood optimization ass…
stat.ML2013★ 88 cited
Spectral Clustering Based on Local PCA
Ery Arias-Castro, Gilad Lerman, Teng Zhang
We propose a spectral clustering method based on local principal components analysis (PCA). After performing local PCA in selected neighborhoods, the algorithm builds a nearest nei…