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On the Analyticity of Underlying HKM Paths for Monotone Semidefinite Linear Complementarity Problems

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  • C. K. Sim

    (The Hong Kong Polytechnic University)

Abstract

An interior point method (IPM) defines a search direction at an interior point of the feasible region. These search directions form a direction field, which in turn defines a system of ordinary differential equations (ODEs). The solutions of the system of ODEs are called off-central paths, underlying paths lying in the interior of the feasible region. It is known that not all off-central paths are analytic, whether w.r.t. μ or $\sqrt{\mu}$ , where μ represents the duality gap, at a solution of a given semidefinite linear complementarity problem, SDLCP (Sim and Zhao, Math. Program. 110:475–499, 2007). In Sim and Zhao (J. Optim. Theory Appl. 137:11–25, 2008), we give a necessary and sufficient condition for when an off-central path is analytic as a function of $\sqrt{\mu}$ at a solution of a general SDLCP. It is then natural to ask about the analyticity of a SDLCP off-central path at a solution, as a function of μ. We investigate this in the current paper. Again, we work under the assumption that the given SDLCP satisfies strict complementarity condition.

Suggested Citation

  • C. K. Sim, 2009. "On the Analyticity of Underlying HKM Paths for Monotone Semidefinite Linear Complementarity Problems," Journal of Optimization Theory and Applications, Springer, vol. 141(1), pages 193-215, April.
    • Handle: RePEc:spr:joptap:v:141:y:2009:i:1:d:10.1007_s10957-008-9480-5
    DOI: 10.1007/s10957-008-9480-5
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    References listed on IDEAS

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    1. Jos F. Sturm, 1999. "Superlinear Convergence of an Algorithm for Monotone Linear Complementarity Problems, When No Strictly Complementary Solution Exists," Mathematics of Operations Research, INFORMS, vol. 24(1), pages 72-94, February.
    2. Sanjay Mehrotra, 1993. "Quadratic Convergence in a Primal-Dual Method," Mathematics of Operations Research, INFORMS, vol. 18(3), pages 741-751, August.
    3. C. K. Sim & G. Zhao, 2008. "Asymptotic Behavior of Helmberg-Kojima-Monteiro (HKM) Paths in Interior-Point Methods for Monotone Semidefinite Linear Complementarity Problems: General Theory," Journal of Optimization Theory and Applications, Springer, vol. 137(1), pages 11-25, April.
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    Cited by:

    1. Chee-Khian Sim, 2011. "Asymptotic Behavior of Underlying NT Paths in Interior Point Methods for Monotone Semidefinite Linear Complementarity Problems," Journal of Optimization Theory and Applications, Springer, vol. 148(1), pages 79-106, January.
    2. Chee-Khian Sim, 2019. "Interior point method on semi-definite linear complementarity problems using the Nesterov–Todd (NT) search direction: polynomial complexity and local convergence," Computational Optimization and Applications, Springer, vol. 74(2), pages 583-621, November.

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