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2020 | OriginalPaper | Chapter

An Extension of the Das and Mathieu QPTAS to the Case of Polylog Capacity Constrained CVRP in Metric Spaces of a Fixed Doubling Dimension

Authors : Michael Khachay, Yuri Ogorodnikov, Daniel Khachay

Published in: Mathematical Optimization Theory and Operations Research

Publisher: Springer International Publishing

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Abstract

The Capacitated Vehicle Routing Problem (CVRP) is the well-known combinatorial optimization problem having numerous practically important applications. CVRP is strongly NP-hard (even on the Euclidean plane), hard to approximate in the general case and APX-complete for an arbitrary metric. Meanwhile, for the geometric settings of the problem, there are known a number of quasi-polynomial and even polynomial time approximation schemes. Among these results, the well-known QPTAS proposed by A. Das and C. Mathieu appears to be the most general. In this paper, we propose the first extension of this scheme to a more wide class of metric spaces. Actually, we show that the metric CVRP has a QPTAS any time when the problem is set up in the metric space of any fixed doubling dimension \(d>1\) and the capacity does not exceed \(\mathrm {polylog}\,{(}n)\).

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Footnotes
1
And the notation \(\mathrm {CVRP\text {-}SD}({Z,D,w,q})\) and \(\mathrm {CVRP\text {-}SD}^*(Z,D,w,q)\) for the case of CVRP-SD as well.
 
2
In Sect. 4.4, we provide a dynamic programming algorithm, which finds such a solution for any given random clustering.
 
3
The general case can be treated similarly, we postpone its consideration to the forthcoming paper.
 
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Metadata
Title
An Extension of the Das and Mathieu QPTAS to the Case of Polylog Capacity Constrained CVRP in Metric Spaces of a Fixed Doubling Dimension
Authors
Michael Khachay
Yuri Ogorodnikov
Daniel Khachay
Copyright Year
2020
DOI
https://doi.org/10.1007/978-3-030-49988-4_4

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