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3-Colourability of Arrangements of Great Circles
Answer to the conjecture
On September 8th, 2014 Anonymous says:
This problem has been solved. See here: http://arxiv.org/abs/math/0408363 . - Anthony Hernandez
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Answer to the conjecture
This problem has been solved. See here: http://arxiv.org/abs/math/0408363 . - Anthony Hernandez