Existence theory for generalized nonlinear complementarity problems

The nonlinear complementarity problem is generalized by replacing the usual nonnegative ordering ofRn by an ordering generated by a convex cone. Two new classes of operators are introduced, each of which is used to guarantee the existence of a solution to the generalized problem. The new classes can be seen to be broader than previously studied classes. In addition, conditions are presented under which the solution set of the generalized linear complementarity problem is shown to have at most a finite number of solutions.