Title of article
Density near zero
Author/Authors
Bayatmanesh ، Elham - Shahed University , Akbari Tootkaboni ، Mohammad - Shahed University
Pages
11
From page
33
To page
43
Abstract
Let S be a dense subsemigroup of (0, +∞). 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
Journal title
Sahand Communications in Mathematical Analysis
Serial Year
2018
Journal title
Sahand Communications in Mathematical Analysis
Record number
2454843
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