Computing the maximum volume inscribed ellipsoid of a polytopic projection
Zhen,Jianzhe den Hertog,Dick
Zhen,Jianzhe
den Hertog,Dick
Abstract
We introduce a novel scheme based on a blending of Fourier-Motzkin elimination (FME) and adjustable robust optimization techniques to compute the maximum volume inscribed ellipsoid (MVE) in a polytopic projection. It is well-known that deriving an explicit description of a projected polytope is NP-hard. Our approach does not require an explicit description of the projection, and can easily be generalized to find a maximally sized convex body of a polytopic projection. Our obtained MVE is an inner approximation of the projected polytope, and its center is a centralized relative interior point of the projection. Since FME may produce many redundant constraints, we apply an LP-based procedure to keep the description of the projected polytopes at its minimal size. Furthermore, we propose an upper bounding scheme to evaluate the quality of the inner approximations. We test our approach on a simple polytope and a color tube design problem, and observe that as more auxiliary variables are eliminated, our inner approximations and upper bounds converge to optimal solutions.
Description
Date
2018-01
Journal Title
Journal ISSN
Volume Title
Publisher
Research Projects
Organizational Units
Journal Issue
Keywords
Fourier-Motzkin elimination, maximum volume inscribed ellipsoid, polytopic projection, Chebyshev center; removing redundant constraints, adjustable robust optimization
Citation
Zhen, J & den Hertog, D 2018, 'Computing the maximum volume inscribed ellipsoid of a polytopic projection', INFORMS Journal on Computing, vol. 30, no. 1, pp. 31-42. https://doi.org/10.1287/ijoc.2017.0763