An Approximation Scheme for Terrain Guarding

@inproceedings{Gibson2009AnAS,
  title={An Approximation Scheme for Terrain Guarding},
  author={Matt Gibson and Gaurav Kanade and Erik Krohn and Kasturi R. Varadarajan},
  booktitle={APPROX-RANDOM},
  year={2009}
}
We obtain a polynomial time approximation scheme for the terrain guarding problem improving upon several recent constant factor approximations. Our algorithm is a local search algorithm inspired by the recent results of Chan and Har-Peled [2] and Mustafa and Ray [15]. Our key contribution is to show the existence of a planar graph that appropriately relates the local and global optimum. 
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