Density near zero
عنوان مقاله: Density near zero
شناسه ملی مقاله: JR_SCMA-9-1_003
منتشر شده در شماره 1 دوره 9 فصل Winter and Spring در سال 1396
شناسه ملی مقاله: JR_SCMA-9-1_003
منتشر شده در شماره 1 دوره 9 فصل Winter and Spring در سال 1396
مشخصات نویسندگان مقاله:
Elham Bayatmanesh
Mohammad Akbari Tootkaboni
خلاصه مقاله:
Elham Bayatmanesh
Mohammad Akbari Tootkaboni
Let S be a dense subsemigroup of (0;+1). In this pa- per, we state de nition of thick near zero, and also we will introduce a de nition that is equivalent to the de nition of piecewise syndetic near zero which presented by Hindman and Leader in [6]. We de ne density near zero for subsets of S by a collection of nonempty nite subsets of S and we investigate the conditions under these concepts.
کلمات کلیدی: The Stone-Cech compacti cation, Density, Piecewise syn- detic set near zero
صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/722845/