منابع مشابه
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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 un...
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ژورنال
عنوان ژورنال: The Analyst
سال: 1889
ISSN: 0003-2654,1364-5528
DOI: 10.1039/an8891400065