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2009
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Approximating edit distance in near-linear time

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Approximating edit distance in near-linear time
We show how to compute the edit distance between two strings of length n up to a factor of 2 ~O( log n) in n1+o(1) time. This is the first sub-polynomial approximation algorithm for this problem that runs in near-linear time, improving on the state-of-the-art n1/3+o(1) approximation. Previously, approximation of 2 ~O( log n) was known only for embedding edit distance into 1, and it is not known if that embedding can be computed in less than quadratic time. Key words. approximation algorithms, edit distance, metric embeddings AMS subject classifications. 68Q25, 68R15, 68W20, 68W25, 68W40
Alexandr Andoni, Krzysztof Onak
Added 23 Nov 2009
Updated 23 Nov 2009
Type Conference
Year 2009
Where STOC
Authors Alexandr Andoni, Krzysztof Onak
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