C-sets near an idempotent of wap-copmpactification of a semitopological semigroup
Tootkaboni, M. A. ; Keshavarzian, J. ; Bayatmanesh, E.
arXiv, Tome 2019 (2019) no. 0, / Harvested from
The natural topology on $\mathbb{R}$ was used to defined ultrafilter near zero by N. Hindman and I. Leader. They showed that a small part closed to zero like the discrete case has rich combinatorial properties. In the weakly almost periodic compactification of discrete topological semigroup $S$, is denoted by $S^w$, idempotents can act like zero in $(0,+\infty)$. In fact, for an idempotent $e\in S^w$ the collection of all ultrafilters near $e$ is defined and form a compact subsemigroup of $\beta S_d$, where $S_d$ is $S$ with discrete topology. In this paper, we will show that Central set Theorem holds near an idempotent of the weakly almost periodic compactification from a discrete semigroup. Also some facts near zero will be state near an idempotent.
Publié le : 2019-03-05
Classification:  Mathematics - Functional Analysis,  Mathematics - Combinatorics,  05D10, Secondary 22A15
@article{1903.02417,
     author = {Tootkaboni, M. A. and Keshavarzian, J. and Bayatmanesh, E.},
     title = {C-sets near an idempotent of wap-copmpactification of a semitopological
  semigroup},
     journal = {arXiv},
     volume = {2019},
     number = {0},
     year = {2019},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1903.02417}
}
Tootkaboni, M. A.; Keshavarzian, J.; Bayatmanesh, E. C-sets near an idempotent of wap-copmpactification of a semitopological
  semigroup. arXiv, Tome 2019 (2019) no. 0, . http://gdmltest.u-ga.fr/item/1903.02417/