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Kernel-function Based Primal-Dual Algorithms for () Linear Complementarity Problems

M. EL GhamiT. Steihaug — 2010

RAIRO - Operations Research

Recently, [Y.Q. Bai, M. El Ghami and C. Roos, SIAM J. Opt. (2004) 101–128] investigated a new class of kernel functions which differs from the class of self-regular kernel functions. The class is defined by some simple conditions on the growth and the barrier behavior of the kernel function. In this paper we generalize the analysis presented in the above paper for () Linear Complementarity Problems (LCPs). The analysis for LCPs deviates significantly from the analysis for linear...

Generic Primal-dual Interior Point Methods Based on a New Kernel Function

M. EL GhamiC. Roos — 2008

RAIRO - Operations Research

In this paper we present a generic primal-dual interior point methods (IPMs) for linear optimization in which the search direction depends on a univariate kernel function which is also used as proximity measure in the analysis of the algorithm. The proposed kernel function does not satisfy all the conditions proposed in [2]. We show that the corresponding large-update algorithm improves the iteration complexity with a factor n 1 6 when compared with the method based on the use of the classical...

Kernel-function Based Algorithms for Semidefinite Optimization

M. EL GhamiY. Q. BaiC. Roos — 2009

RAIRO - Operations Research

Recently, Y.Q. Bai, M. El Ghami and C. Roos [3] introduced a new class of so-called eligible kernel functions which are defined by some simple conditions. The authors designed primal-dual interior-point methods for linear optimization (LO) based on eligible kernel functions and simplified the analysis of these methods considerably. In this paper we consider the semidefinite optimization (SDO) problem and we generalize the aforementioned results for LO to SDO. The iteration bounds obtained are...

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