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Jun 16, 2019 at 6:53 comment added Ashutosh You can get the other direction using Lemma 2 in P. Erdos, A. Hajnal, On chromatic numbers of infinite graphs, here renyi.hu/~p_erdos/1968-04.pdf
Jun 14, 2019 at 20:36 history asked James E Hanson CC BY-SA 4.0