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arXiv 2209.01433math.OC
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带指示变量的二次约束的一个注记:凸包描述与透视松弛

A note on quadratic constraints with indicator variables: Convex hull description and perspective relaxation

Andres Gomez, Weijun Xie

摘要:

本文研究了由连续变量上的可分二次约束给出的混合整数非线性集,其中每个连续变量由一个附加指标控制。这个集合普遍存在于具有不确定性的最优化问题和机器学习中。我们表明,在这个集合上的优化是NP-困难的。尽管这个负面的结果,我们的凸包的结构特征,并表明,它可以正式研究使用多面体理论。此外,我们表明,虽然在文献中的透视松弛这一套未能匹配的结构,其凸包,它是保证是一个密切的近似。

英文摘要:

In this paper, we study the mixed-integer nonlinear set given by a separable quadratic constraint on continuous variables, where each continuous variable is controlled by an additional indicator. This set occurs pervasively in optimization problems with uncertainty and in machine learning. We show that optimization over this set is NP-hard. Despite this negative result, we characterize the structure of the convex hull, and show that it can be formally studied using polyhedral theory. Moreover, we show that although perspective relaxation in the literature for this set fails to match the structure of its convex hull, it is guaranteed to be a close approximation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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