@article {
author = {Bayatmanesh, Elham and Akbari Tootkaboni, Mohammad},
title = {Density near zero},
journal = {Sahand Communications in Mathematical Analysis},
volume = {09},
number = {1},
pages = {33-43},
year = {2018},
publisher = {University of Maragheh},
issn = {2322-5807},
eissn = {2423-3900},
doi = {10.22130/scma.2018.23682},
abstract = {Let $S$ be a dense subsemigroup of $(0,+\infty)$. In this paper, we state definition of thick near zero, and also we will introduce a definition that is equivalent to the definition of piecewise syndetic near zero which presented by Hindman and Leader in [6]. We define density near zero for subsets of $S$ by a collection of nonempty finite subsets of $S$ and we investigate the conditions under these concepts.},
keywords = {The Stone-Cech compactification,Density,Piecewise syndetic set near zero},
url = {http://scma.maragheh.ac.ir/article_23682.html},
eprint = {http://scma.maragheh.ac.ir/article_23682_545b6075235df500f5ed73aa31024524.pdf}
}