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- W2020005532 abstract "Trees with positively weighted edges induce a natural metric on any subset of vertices, however not every metric is representable in this way. A problem arising in areas of classification, particularly in evolutionary biology, is how to approximate an arbitrary distance function by such a tree metric, and thereby estimate the underlying tree that generated the data. Such transformations, from distances to tree metrics (and thereby to edge-weighted trees) should have some basic properties such as continuity, but this is lacking in several popular methods, for example (as we show) in “neighbor joining.” However, a continuous transformation, due to Buneman, frequently leads to uninteresting trees. We show how Buneman's construction can be refined so as to lead to more informative trees without sacrificing continuity, and we provide two simple examples of its use. We also provide a sufficient condition for both the Buneman construction, and its refinement to correctly recover the underlying tree." @default.
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- W2020005532 date "1999-01-01" @default.
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- W2020005532 title "Retractions of finite distance functions onto tree metrics" @default.
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- W2020005532 doi "https://doi.org/10.1016/s0166-218x(98)00128-0" @default.
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