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Chapter and Conference Paper
On the approximability of the Steiner tree problem in phylogeny
Three results on the Steiner tree problem are presented: (i) Computing optimum k-restricted Steiner tree is APX-complete for k≥4, (ii) the minimum-cost k-restricted Steiner tree problem in phylogeny is APX-comple...
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Chapter and Conference Paper
Space-sweep algorithms for parametric optimization
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Chapter and Conference Paper
On matroids and hierarchical graphs