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Arithmetic Progressions Contained in Sequences with Bounded Gaps

Published online by Cambridge University Press:  20 November 2018

Melvyn B. Nathanson*
Affiliation:
Department of MathematicsSouthern Illinois University, Carbondale Illinois 62901
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Van der Waerden [1, 4, 5] proved that if the nonnegative integers are partitioned into a finite number of sets, then at least one set in the partition contains arbitrarily long finite arithmetic progressions. This is equivalent to the result that a strictly increasing sequence of integers with bounded gaps contains arbitrarily long finite arithmetic progressions. Szemerèdi [3] proved the much deeper result that a sequence of integers of positive density contains arbitrarily long finite arithmetic progressions. The purpose of this note is a quantitative comparison of van der Waerden's theorem and sequences with bounded gaps.

Type
Research Article
Copyright
Copyright © Canadian Mathematical Society 1980

References

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4. van der Waerden, B. L., Beweis einer Baudef′schen Vermutung, Nieuw Arch. Wiskunde 15 (1927), 212-216.Google Scholar
5. van der Waerden, B. L., How the proof of Baudet′s conjecture was found, Studies in Pure Mathematics, L. Mirsky, éd., Academic Press, New York, 1971, 251-260.Google Scholar