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Creators/Authors contains: "Sintos, S"

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  1. ; ; ; (, Proc. 35th Annual ACM SIAM Symposium on Discrete Algorithms)
    Full Text Available 
  2. ; ; (, Approximation, Randomization, and Combinatorial Optimization. Algorithms and Techniques)
    Given a set of points P and axis-aligned rectangles R in the plane, a point p ∈ P is called exposed if it lies outside all rectangles in R. In the max-exposure problem, given an integer parameter k, we want to delete k rectangles from R so as to maximize the number of exposed points. We show that the problem is NP-hard and assuming plausible complexity conjectures is also hard to approximate even when rectangles in R are translates of two fixed rectangles. However, if R only consists of translates of a single rectangle, we present a polynomial-time approximation scheme. For general rectangle range space, we present a simple O(k) bicriteria approximation algorithm; that is by deleting O(k2) rectangles, we can expose at least Ω(1/k) of the optimal number of points. 
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    Accepted Manuscript Full Text Available
  3. ; ; ; (, 16th Scandinavian Symposium and Workshops on Algorithm Theory ()
    Accepted Manuscript Full Text Available