Titlebook: Approximation, Randomization, and Combinatorial Optimization. Algorithms and Techniques; 6th International Wo Sanjeev Arora,Klaus Jansen,Am

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Lecture Notes in Computer ScienceWe show that it is NP-hard to .-approximate the integral of a positive, smooth, polynomial-time computable .-variate function, for any fixed integer ..

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Approximating the Degree-Bounded Minimum Diameter Spanning Tree ProblemWe consider the problem of finding a minimum diameter spanning tree with maximum node degree . in a complete undirected edge-weighted graph. We prove that the problem is NP-complete, and provide an .-approximation algorithm for the problem. Our algorithm is purely combinatorial, and relies on a combination of . and ..

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https://doi.org/10.1007/b11961algorithm; algorithms; combinatorial optimization; complexity; complexity theory; computer; computer scien

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Lecture Notes in Computer Sciencehttp://image.papertrans.cn/b/image/160465.jpg

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https://doi.org/10.1007/978-94-009-5878-4nimize the total absolute weight of cut positive edges and uncut negative edges. Thus, large positive weights (representing strong correlations between endpoints) encourage those endpoints to belong to a common cluster; large negative weights encourage the endpoints to belong to different clusters;