Discussion: Latent variable graphical model selection via convex   optimization
  Discussion of "Latent variable graphical model selection via convex optimization" by Venkat Chandrasekaran, Pablo A. Parrilo and Alan S. Willsky [arXiv:1008.1290]. 
Steffen Lauritzen, Nicolai Meinshausen
math.ST cs.LG stat.ML stat.TH