Direct Estimation of Differential Networks
Dave Zhao, Tony Cai, and Hongzhe Li
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A constrained l1 minimization approach to sparse precision matrix estimation.
J. American Statistical Association 106, 594-607.
Cai, T. T., Liu, W. & Zhou, H. (2014).
Estimating sparse precision matrix: Optimal rates of convergence and adaptive estimation.
The Annals of Statistics, to appear.