Hao Yin

Strong NP-Hardness for Sparse Optimization with Concave Penalty Functions

Mengdi Wang, Hao Yin, Zizhuo Wang, 2015, ICML.

Strong NP-Hardness Result for Regularized $L_q$-Minimization Problems with Concave Penalty Functions pdf

Hao Yin, Zizhuo Wang, Yinyu Ye, 2015, ArXiv.