Computing Minimum Diameter Color-Spanning Sets


We study the minimum diameter color-spanning set problem which has recently drawn some attention in the database community. We show that the problem can be solved in polynomial time for L1 and L∞ metrics, while it is NP-hard for all other Lp metrics even in two dimensions. However, we can efficiently compute a constant factor approximation. 
DOI: 10.1007/978-3-642-14553-7_27

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