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The Cartographer
Sorting by Prefix Block-Interchanges
August 31, 2020 Β· Declared Dead Β· π International Symposium on Algorithms and Computation
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Authors
Anthony Labarre
arXiv ID
2008.13640
Category
cs.DS: Data Structures & Algorithms
Citations
7
Venue
International Symposium on Algorithms and Computation
Last Checked
4 months ago
Abstract
We initiate the study of sorting permutations using prefix block-interchanges, which exchange any prefix of a permutation with another non-intersecting interval. The goal is to transform a given permutation into the identity permutation using as few such operations as possible. We give a 2-approximation algorithm for this problem, show how to obtain improved lower and upper bounds on the corresponding distance, and determine the largest possible value for that distance.
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