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Published in:
2012 | OriginalPaper | Chapter
Introduction
Authors : Ding-Zhu Du, Ker-I Ko, Xiaodong Hu
Published in: Design and Analysis of Approximation Algorithms
Publisher: Springer New York
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When exact solutions are hard to compute, approximation algorithms can help. In this chapter, we introduce the basic notions of approximation algorithms.We study a simple optimization problem to demonstrate the tradeoff between the time complexity and performance ratio of its approximation algorithms. We also present a brief introduction to the general theory of computational complexity and show how to apply this theory to classify optimization problems according to their approximability.