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The multi-level uncapacitated facility location problem is not submodular

✍ Scribed by A.I. Barros; M. Labbé


Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
208 KB
Volume
71
Category
Article
ISSN
0377-2217

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The approximation gap for the metric fac
✍ Jaroslaw Byrka; Karen Aardal 📂 Article 📅 2007 🏛 Elsevier Science 🌐 English ⚖ 150 KB

We consider the 1.52-approximation algorithm of Mahdian et al. for the metric uncapacitated facility location problem. We show that their algorithm does not close the gap with the lower bound on approximability, 1.463, by providing a construction of instances for which its approximation ratio is not