A nonlinear Lagrangian dual for integer programming

  • Authors:
  • Yifan Xu;Duan Li

  • Affiliations:
  • School of Management, Fudan University, Shanghai 200433, People's Republic of China;Department of System Engineering and Engineering Management, The Chinese University of Hong Kong, NT, Hong Kong

  • Venue:
  • Operations Research Letters
  • Year:
  • 2002

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Abstract

Nonlinear Lagrangian theory offers a success guarantee for the dual search via construction of a nonlinear support of the perturbation function at the optimal point. In this paper, a new nonlinear dual formulation of an exponential form is proposed for bounded integer programming. This new formulation possesses an asymptotic strong duality property and guarantees a success in identifying a primal optimum solution. No actual dual search is needed in the solution process when the parameter of the nonlinear Lagrangian formulation is set to be large enough.