Density near zero
Publish Year: 1396
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_SCMA-9-1_003
تاریخ نمایه سازی: 15 اردیبهشت 1397
Abstract:
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.
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