“…In recent years, the classical complementarity problem and variational inequality theory have been extended and generalized to study a wide class of problems arising in mechanics, physics, optimization and control, nonlinear programming, game theory, economics, finance, regional, structural, transportation, elasticity, and applied sciences, etc. (see, for example, [1][2][3][4][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] and the references therein).…”