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arXiv 1802.05795math.OCcs.CC
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区间线性规划的对偶间隙

Duality Gap in Interval Linear Programming

Jana Novotná, Milan Hladík, Tomáš Masařík

摘要:

本文讨论了用实封闭的区间表示不精确数据的线性规划问题。区间数据的最优化问题在实际计算中经常出现,四十多年来一直是理论界关注的问题。本文将对偶间隙(DG)的概念推广到区间线性规划中。我们考虑两种情况:首先,DG是零的区间参数的每个实现(所谓的强零DG),第二,DG是零的区间参数的至少一个实现(所谓的弱零DG)。我们刻画了强零DG和弱零DG及其系数系数矩阵为实数的特殊情形。本文讨论了用实系数矩阵检验常用类型的区间线性规划及其变型的弱零DG和强零DG的计算复杂性。我们区分NP难的情况下,是有效的判决的情况下。基于DG条件,我们推广了Rohn给出的关于最优值集的界的结果.我们提供了等价的声明的界限

英文摘要:

This paper deals with the problem of linear programming with inexact data represented by real closed intervals. Optimization problems with interval data arise in practical computations and they are of theoretical interest for more than forty years. We extend the concept of duality gap (DG), the difference between the primal and its dual optimal value, into interval linear programming. We consider two situations: First, DG is zero for every realization of interval parameters (the so called strongly zero DG) and, second, DG is zero for at least one realization of interval parameters (the so called weakly zero DG). We characterize strongly and weakly zero DG and its special case where the matrix of coefficients is real. We discuss computational complexity of testing weakly and strongly zero DG for commonly used types of interval linear programs and their variants with the real matrix of coefficients. We distinguish the NP-hard cases and the cases that are efficiently decidable. Based on DG conditions, we extend previous results about the bounds of the optimal value set given by Rohn. We provide equivalent statements for the bounds

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