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An interior-point method for mpecs based on strictly feasible relaxations


  • Nogales Martín, Francisco Javier
  • Miguel, Angel Víctor de
  • Friedlander, Michael P.
  • Scholtes, Stefan


An interior-point method for solving mathematical programs with equilibrium constraints (MPECs) is proposed. At each iteration of the algorithm, a single primaldual step is computed from each subproblem of a sequence. Each subproblem is defined as a relaxation of the MPEC with a nonempty strictly feasible region. In contrast to previous approaches, the proposed relaxation scheme preserves the nonempty strict feasibility of each subproblem even in the limit. Local and superlinear convergence of the algorithm is proved even with a less restrictive strict complementarity condition than the standard one. Moreover, mechanisms for inducing global convergence in practice are proposed. Numerical results on the MacMPEC test problem set demonstrate the fast-local convergence properties of the algorithm.

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  • Nogales Martín, Francisco Javier & Miguel, Angel Víctor de & Friedlander, Michael P. & Scholtes, Stefan, 2004. "An interior-point method for mpecs based on strictly feasible relaxations," DES - Working Papers. Statistics and Econometrics. WS ws042408, Universidad Carlos III de Madrid. Departamento de Estadística.
  • Handle: RePEc:cte:wsrepe:ws042408

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