Richness of arithmetic progression in commutative semigroup
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Publication:5109333
zbMATH Open1434.11032arXiv1904.10104MaRDI QIDQ5109333
Sayan Goswami, Aninda Chakraborty
Publication date: 11 May 2020
Abstract: Furstenberg and Glasner proved that for an arbitrary k in N, any piecewise syndetic set contains k term arithmetic progressions and such collection is also piecewise syndetic in Z: They used algebraic structure of beta N. The above result was extended for arbitrary semigroups by Bergelson and Hindman, again using the structure of Stone-Cech compactification of general semigroup. Beiglboeck provided an elementary proof of the above result and asked whether the combinatorial argument in his proof can be enhanced in a way which makes it applicable to a more abstract setting. In a recent work the second author of this paper and S.Jana provided an affirmative answer to Beiglboeck's question for countable commutative semigroup. In this work we will extend the result of Beiglboeck in different type of settings.
Full work available at URL: https://arxiv.org/abs/1904.10104
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Related Items (2)
Title not available (Why is that?) ⋮ Abundance of progressions in a commutative semigroup by elementary means
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