عناصر مشابهة
Preroughness and Preexactness in Topological Spaces
| المصدر: | المجلة الجامعة |
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| الناشر: |
جامعة الزاوية - مركز البحوث والدراسات العليا
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| المؤلف الرئيسي: | |
| المجلد/العدد: | مج18, ع3 |
| محكمة: | نعم |
| الدولة: | ليبيا |
| التاريخ الميلادي: | 2016 |
| الصفحات: | 25 - 42 |
| رقم MD: | 1263826 |
| نوع المحتوى: | بحوث ومقالات |
| اللغة: | English |
| قواعد المعلومات: | EduSearch EcoLink IslamicInfo AraBase HumanIndex |
| مواضيع: | |
| رابط المحتوى: |
| المستخلص: | Generalization of rough set model is an important aspect of rough set theory research. In this paper, we use atopological concepts to introduce a generalization of Pawlak approximation space. Concepts of definability for subsets in topological approximation spaces are introduced. Several types of approximations which called pre approximations are mathematical tools to modify the approximations. In this paper we introduce the pre exactness and pre roughness by applying the concepts of pre open sets to make more accuracy for definability of sets, and we present new types of rough definability and rough indefinability based on these approximations. |
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