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arXiv 2108.07053math.OC
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凸向量最优化问题的几何对偶结果及逼近算法

Geometric duality results and approximation algorithms for convex vector optimization problems

Çağın Ararat, Simay Tekgül, Firdevs Ulus

摘要:

研究了凸向量最优化问题的几何对偶性。对于一个$q$维目标空间的原问题,我们构造了一个$(q+1)$维目标空间的对偶问题.因此,与现有的方法不同,几何对偶问题不依赖于一个固定的方向参数,所得到的对偶图像是一个凸锥。我们证明了一个一对一的对应关系的原始和双重图像的某些面孔。此外,我们表明,一个图像的多面体近似产生的多面体近似的其他。在此基础上,我们提出了一个几何对偶算法,同时解决原始和对偶问题,是免费的方向偏置。我们还修改了现有的无方向原始算法的方式,它解决了对偶问题。我们使用所谓的原始错误和超卷指标作为性能指标,测试随机生成的问题实例的算法的性能。

英文摘要:

We study geometric duality for convex vector optimization problems. For a primal problem with a $q$-dimensional objective space, we formulate a dual problem with a $(q+1)$-dimensional objective space. Consequently, different from an existing approach, the geometric dual problem does not depend on a fixed direction parameter and the resulting dual image is a convex cone. We prove a one-to-one correspondence between certain faces of the primal and dual images. In addition, we show that a polyhedral approximation for one image gives rise to a polyhedral approximation for the other. Based on this, we propose a geometric dual algorithm which solves the primal and dual problems simultaneously and is free of direction-biasedness. We also modify an existing direction-free primal algorithm in a way that it solves the dual problem as well. We test the performance of the algorithms for randomly generated problem instances by using the so-called primal error and hypervolume indicator as performance measures.

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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