A few logs suffice to build (almost) all trees: part II
Theoretical Computer Science
Computers and Intractability: A Guide to the Theory of NP-Completeness
Computers and Intractability: A Guide to the Theory of NP-Completeness
LATIN '00 Proceedings of the 4th Latin American Symposium on Theoretical Informatics
Computing Phylogenetic Diversity for Split Systems
IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB)
Nature Reserve Selection Problem: A Tight Approximation Algorithm
IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB)
Budgeted Phylogenetic Diversity on Circular Split Systems
IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB)
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The phylogenetic diversity (PD) of a set of species is a measure of their evolutionary distinctness based on a phylogenetic tree. PD is increasingly being adopted as an index of biodiversity in ecological conservation projects. The Noah's Ark Problem (NAP) is an NP-Hard optimization problem that abstracts a fundamental conservation challenge in asking to maximize the expected PD of a set of taxa given a fixed budget, where each taxon is associated with a cost of conservation and a probability of extinction. Only simplified instances of the problem, where one or more parameters are fixed as constants, have as of yet been addressed in the literature. Furthermore, it has been argued that PD is not an appropriate metric for models that allow information to be lost along paths in the tree. We therefore generalize the NAP to incorporate a proposed model of feature loss according to an exponential distribution and term this problem NAP with Loss (NAPL). In this paper, we present a pseudopolynomial time approximation scheme for NAPL.