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A new proof of the density Hales-Jewett theorem

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The density Hales-Jewett theorem has the same relationship to the Hales-Jewett theorem that Szemerédi’s theorem has to van der Waerden’s theorem. Until recently, the only known proof was long and complicated and relied heavily on ergodic theory. Recently an elementary and much simpler proof has been discovered. Unusually, the research was carried out in the open by several people on blogs and a wiki. This talk will, however, be about the mathematics rather than the unusual process that led to it.

This talk is part of the Discrete Analysis Seminar series.

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