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- W2963969314 abstract "Motivated by comparative genomics, Chen et al. [9] introduced the Maximum Duo-preservation String Mapping (MDSM) problem in which we are given two strings $$s_1$$ and $$s_2$$ from the same alphabet and the goal is to find a mapping $$pi $$ between them so as to maximize the number of duos preserved. A duo is any two consecutive characters in a string and it is preserved in the mapping if its two consecutive characters in $$s_1$$ are mapped to same two consecutive characters in $$s_2$$ . The MDSM problem is known to be NP-hard and there are approximation algorithms for this problem [3, 5], all of which consider only the “unweighted” version of the problem in the sense that a duo from $$s_1$$ is preserved by mapping to any same duo in $$s_2$$ regardless of their positions in the respective strings. However, it is well-desired in comparative genomics to find mappings that consider preserving duos that are “closer” to each other under some distance measure [18]. In this paper, we introduce a generalized version of the problem, called the Maximum-Weight Duo-preservation String Mapping (MWDSM) problem, capturing both duos-preservation and duos-distance measures in the sense that mapping a duo from $$s_1$$ to each preserved duo in $$s_2$$ has a weight, indicating the “closeness” of the two duos. The objective of the MWDSM problem is to find a mapping so as to maximize the total weight of preserved duos. We give a polynomial-time 6-approximation algorithm for this problem." @default.
- W2963969314 created "2019-07-30" @default.
- W2963969314 creator A5044857258 @default.
- W2963969314 date "2017-01-01" @default.
- W2963969314 modified "2023-09-26" @default.
- W2963969314 title "Approximating Weighted Duo-Preservation in Comparative Genomics" @default.
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- W2963969314 doi "https://doi.org/10.1007/978-3-319-62389-4_33" @default.
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