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Approximate strip exchanging.

Identifieur interne : 000056 ( PubMed/Corpus ); précédent : 000055; suivant : 000057

Approximate strip exchanging.

Auteurs : Swapnoneel Roy ; Ashok Kumar Thakur

Source :

RBID : pubmed:20055003

English descriptors

Abstract

Genome rearrangements have been modelled by a variety of primitives such as reversals, transpositions, block moves and block interchanges. We consider such a genome rearrangement primitive Strip Exchanges. Given a permutation, the challenge is to sort it by using minimum number of strip exchanges. A strip exchanging move interchanges the positions of two chosen strips so that they merge with other strips. The strip exchange problem is to sort a permutation using minimum number of strip exchanges. We present here the first non-trivial 2-approximation algorithm to this problem. We also observe that sorting by strip-exchanges is fixed-parameter-tractable. Lastly we discuss the application of strip exchanges in a different area Optical Character Recognition (OCR) with an example.

PubMed: 20055003

Links to Exploration step

pubmed:20055003

Le document en format XML

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