AccScience Publishing / IJOCTA / Volume 3 / Issue 2 / DOI: 10.11121/ijocta.01.2013.00156
OPTIMIZATION & APPLICATIONS

A multi-parametric programming algorithm for special classes of non-convex multilevel optimization problems

Abay Molla Kassa1 d Semu Mitiku Kassa2*
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1 Department of Chemical Engineering, Addis Ababa Institute of Technology P.O.Box 1176, Addis Ababa, Ethiopia
2 Department of Mathematics, Addis Ababa University P.O.Box 1176, Addis Ababa, Ethiopia
IJOCTA 2013, 3(2), 133–144; https://doi.org/10.11121/ijocta.01.2013.00156
Submitted: 15 February 2013 | Published: 6 June 2013
© 2013 by the Author(s). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution -Noncommercial 4.0 International License (CC-by the license) ( https://creativecommons.org/licenses/by-nc/4.0/ )
Abstract

A global solution strategy for multilevel optimization problems with special non-convexityformulation in the objectives of the inner level problems is presented based on branch-and-bound andmulti-parametric programming approach. An algorithm to such problems is proposed by convexifyingthe inner level problem while the variables from upper level problems are considered as parameters.The resulting convex parametric under-estimator problem is solved using multi-parametric program-ming approach. A branch-and-bound procedure is employed until a pre-specied positive tolerance issatised. Moreover, a ϵ-convergence proof is given for the algorithm.

Keywords
Multi-level programming; multi-parametric programming; branch-and-bound; convexifi- cation
Conflict of interest
The authors declare they have no competing interests.
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