Tighten after Relax: Minimax-Optimal Sparse PCA in Polynomial Time. - Zhaoran Wang 001; Huanran Lu; Han Liu 001 (NIPS, 2014)

Nonconvex Statistical Optimization: Minimax-Optimal Sparse PCA in Polynomial Time. - Zhaoran Wang 001; Huanran Lu; Han Liu 001 (CoRR, 2014)

A direct estimation of high dimensional stationary vector autoregressions. - Fang Han; Huanran Lu; Han Liu 001 (J. Mach. Learn. Res., 2015)