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Published February 12, 2021 | Submitted
Journal Article Open

Lower bounds for multicolor Ramsey numbers


We give an exponential improvement to the lower bound on diagonal Ramsey numbers for any fixed number of colors greater than two.

Additional Information

© 2020 Elsevier Inc. Received 24 September 2020, Revised 25 November 2020, Accepted 26 November 2020, Available online 9 December 2020. Research supported in part by NSF grants DMS-1954395 and DMS-1953799. We are extremely grateful to Vishesh Jain and Wojciech Samotij for reading an early draft of this paper and offering several suggestions which improved the presentation. We also owe a debt to Noga Alon and Anurag Bishnoi, both of whom pointed out the constraint on the dimension of isotropic subspaces, thereby improving the bound in our original posting.

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Submitted - 2009.10458.pdf


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August 22, 2023
October 23, 2023