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Minimum principle sufficiency. (English) Zbl 0760.90076
The authors study the determination of a solution of a convex program by minimizing over the feasible region a linearized form of the objective function at any of its solution points (Minimum Principle Sufficiency, shortly MPS). Thus, for the case of a monotone linear complementarity problem the MPS property is equivalent to the existence of a nondegenerate solution to the problem. For the case of a convex quadratic program, the MPS property is equivalent to the span of the Hessian of the objective function being contained in the normal cone to the feasible region at any solution point, plus the cone generated by the gradient of the objective function at any solution point. This in turn is equivalent to the quadratic program having a weak sharp minimum. An important application of the MPS property is that minimizing on the feasible region a linearization of the objective function at a point in a neighborhood of a solution point gives an exact solution of the convex program.

##### MSC:
 90C25 Convex programming 90C33 Complementarity and equilibrium problems and variational inequalities (finite dimensions) (aspects of mathematical programming)
##### Keywords:
minimum principle; monotone linear complementarity
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##### References:
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