Titlebook: Algorithmic Aspects in Information and Management; 14th International C Zhao Zhang,Wei Li,Ding-Zhu Du Conference proceedings 2020 Springer

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https://doi.org/10.1007/978-3-658-21663-4e . and an independent set of size ., such that each node in the independent set is adjacent to exactly one node in the clique. For various optimization objective functions studied in the literature, we present improved hardness and approximation results.

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Sebastian Horn,Dennis Thorwarthall set of points called outliers (as a constraint, the number of outliers can not be greater than a given integer) can be ignored. Using local search method, we give a constant-factor approximation algorithm that may violate slightly the constraint about the number of outliers.

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Lecture Notes in Computer Sciencehttp://image.papertrans.cn/a/image/152885.jpg

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On Approximations for Constructing 1-Line Minimum Rectilinear Steiner Trees in the Euclidean Plane r tree (CMRST) problem..We obtain three main results as follows. (1) We design an exact algorithm in time . to solve the CMRST problem; (2) We show that the same algorithm in (1) is a 1.5-approximation algorithm to solve the 1LF-MRST problem; (3) Using a combination of the algorithm in (1) for many

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