Non commutative multidimensional stronger Central Sets Theorem

TL;DR

This paper extends the Central Sets Theorem to non-commutative semigroups, introduces a polynomial generalization, and unifies several classical Ramsey theoretic results in a broader algebraic context.

Contribution

It provides a non-commutative extension of Beiglboeck's theorem and a polynomial generalization, advancing the understanding of combinatorial structures in algebraic systems.

Findings

Extended Central Sets Theorem to non-commutative semigroups.

Developed a polynomial generalization of Beiglboeck's theorem.

Unified classical Ramsey results within a non-commutative framework.

Abstract

Hindman's theorem and van der Waerden's theorem are two classical Ramsey theoretic results, the first one deals with finite configurations and the second one deals with infinite configurations. The Central Sets Theorem due to Furstenberg is a strong simultaneous extension of both theorems, which also applies to general commutative semigroups. Beiglboeck provided a common extension of the Central Sets Theorem and Milliken-Taylor Theorem in commutative case. Furstenberg's original Central Sets Theorem was proved in \cite{key-2} for $\left(\mathbb{N},+\right)$ for finitely many sequences at a time. Bergelson and Hindman provided a non commutative version of this Theorem \cite{key-3}. The first author of this article jointly with Hindman and Straus provided a non-commutative version of Central Sets Theorem using arbitrary many sequence at a time \cite{key-5}. In this work we will provide a non-commutative extension of Beiglboeck's Theorem. We also provide polynomial generalization of Beiglbock's theorem.