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    THE LEFT (RIGHT) ROUGH APPROXIMATIONS IN A GROUP
    (Pushpa Publishing House, 2019) Bagirmaz, Nurettin; Tasbozan, Hatice
    Rough set theory proposes a new mathematical approach to model vagueness. In this paper, we introduce a new definition for rough approximations with respect to the subgroups of a group, which is called the left (right) lower and upper approximations. In fact, we prove that this definition is a generalization of definition in [5]. Then we give some properties of these rough approximations.
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    Soft Sets and Soft Topology on Nearness Approximation Spaces
    (Univ Nis, Fac Sci Math, 2017) Tasbozan, Hatice; Icen, Ilhan; Bagirmaz, Nurettin; Ozcan, Abdullah Fatih
    Near set theory presents a fundamental basis for observation, comparison and classification of perceptual granules. Soft set theory is proposed as a general framework to model vagueness. The purpose of this paper is to combine these two theories in what are known near soft sets in defining near soft topology based on a nearness approximation space.