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SIAMDM
2008

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Coloring of Triangle-Free Graphs on the Double Torus

15 years 2 months ago

We show that every triangle-free graph on the double torus is 4-colorable. This settles a problem raised by Gimbel and Thomassen [Trans. Amer. Math. Soc. 349 (1997), 4555

Daniel Král, Matej Stehlík

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