Existence of local saddle points for a new augmented Lagrangian function. Zhao, Wenling; Zhang, Jing; Zhou, Jinchuan — 2010 Mathematical Problems in Engineering
Necessary and sufficient conditions for the existence of a Hermitian positive definite solution of a type of nonlinear matrix equations. Zhao, Wenling; Li, Hongkui; Liu, Xueting; Xu, Fuyi — 2009 Mathematical Problems in Engineering