English

Combined algebraic and multiplicative properties near zero

Combinatorics 2012-01-24 v3

Abstract

It was proved that whenever N\mathbb{N} is partitioned into finitely many cells, one cell must contain arbitrary length arithmetic and geometric progression nicely intertwined, so that one cell must be rich in the sense of containing substantial combined additive and multiplicative properties. Further it is known that IP^* and central^* sets are also rich in substantial combined additive and multiplicative properties but not partition regular. In this article we prove that these types of results also hold near zero for dense subsemigroups SS of ((0,),+)((0,\infty),+) for which (S(0,1),)(S\cap(0,1),\cdot).

Keywords

Cite

@article{arxiv.1201.1224,
  title  = {Combined algebraic and multiplicative properties near zero},
  author = {Dibyendu De and Ram Krishna Paul},
  journal= {arXiv preprint arXiv:1201.1224},
  year   = {2012}
}

Comments

This paper has been withdrawn due to some crutial error

R2 v1 2026-06-21T20:00:51.412Z