Abstract
We answer, in the affirmative, the following question proposed by Mike Steel as a $100 challenge: “Is the following problem NP -hard? Given a ternary phylogenetic X -tree \({\cal T}\) and a collection \(\cal Q\) of quartet subtrees on X , is \({\cal T}\) the only tree that displays \(\cal Q\) ?” [28, 29] As a particular consequence of this, we show that the unique chordal sandwich problem is also NP-hard.
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Habib, M., Stacho, J. (2011). Unique Perfect Phylogeny Is NP-Hard. In: Giancarlo, R., Manzini, G. (eds) Combinatorial Pattern Matching. CPM 2011. Lecture Notes in Computer Science, vol 6661. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-21458-5_13
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