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Timeline for Understanding of Ramsey theorem

Current License: CC BY-SA 4.0

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Jul 1 at 18:30 vote accept A. H.
Jul 1 at 18:02 comment added Andreas Blass @A.H. Pigeons are the $(k-1)c+1$ steps. Holes are the $c$ colors. PHP says some hole must have $k$ pigeons. (Vincent's answer essentially contains the proof of this form of PHP.)
Jul 1 at 16:43 comment added A. H. Would you explain, how pigeon hole principle is using here for $(k-1)c?$ My teacher said me to use PHP.
Jul 1 at 16:36 history answered Vincent CC BY-SA 4.0