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- W2013502078 abstract "This paper considers the problem of determining whether a given set T of rooted triplets can be merged without conflicts into a galled phylogenetic network, and if so, constructing such a network. When the input T is dense, we solve the problem in O(|T|) time, which is optimal since the size of the input is Θ(|T|). In comparison, the previously fastest algorithm for this problem runs in O(|T|2) time. Next, we prove that the problem becomes NP-hard if extended to non-dense inputs, even for the special case of simple phylogenetic networks. We also show that for every positive integer n, there exists some set T of rooted triplets on n leaves such that any galled network can be consistent with at most 0.4883·|T| of the rooted triplets in T. On the other hand, we provide a polynomial-time approximation algorithm that always outputs a galled network consistent with at least a factor of 5/12 (>0.4166) of the rooted triplets in T." @default.
- W2013502078 created "2016-06-24" @default.
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- W2013502078 date "2005-01-23" @default.
- W2013502078 modified "2023-09-24" @default.
- W2013502078 title "Algorithms for combining rooted triplets into a galled phylogenetic network" @default.
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- W2013502078 doi "https://doi.org/10.5555/1070432.1070481" @default.
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