Approximate Coloring of Uniform Hypergraphs (Extended Abstract)

@inproceedings{Krivelevich1998ApproximateCO,
  title={Approximate Coloring of Uniform Hypergraphs (Extended Abstract)},
  author={Michael Krivelevich and Benny Sudakov},
  booktitle={ESA},
  year={1998}
}
We consider an algorithmic problem of coloring r-uniform hypergraphs. The problem of finding the exact value of the chromatic number of a hypergraph is known to be NP-hard, so we discuss approximate solutions to it. Using a simple construction and known results on hardness of graph coloring, we show that for any r ≥ 3 it is impossible to approximate in polynomial time the chromatic number of r-uniform hypergraphs on n vertices within a factor n1-Ɛ for any Ɛ > 0, unless NP ⊆ ZPP. On the positive… 
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