On bounding the chromatic number of L-graphs

@article{McGuinness1996OnBT,
  title={On bounding the chromatic number of L-graphs},
  author={Sean McGuinness},
  journal={Discrete Mathematics},
  year={1996},
  volume={154},
  pages={179-187}
}
We show that the intersection graph of a collection of subsets of the plane, where each subset forms an “L” shape whose vertical stem is infinite, has its chromatic number 1 bounded by a function of the order of its largest clique w, where it is shown that ;1<2”4’3”4”‘~‘-“. This proves a special case of a conjecture of Gyarf& and Lehel. 

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