This volume is a collection of papers that cover such diverse areas as linear and non-linear complementarity problems, variational inequality problems, non-smooth equations and non-smooth optimization problems, economic and network equilibrium problems, semi-definite programming problems, maximal monotone operator problems, and mathematical programs with equilibrium constraints. It provides useful tools for advancing the study of mathematical programming from both theoretical and practical aspects. The book is intended for students and researchers in optimization, mathematical programming, and operations research.