Textures and covering based rough sets

DİKER M., UGUR A. A.

INFORMATION SCIENCES, cilt.184, sa.1, ss.44-63, 2012 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 184 Sayı: 1
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1016/j.ins.2011.08.012
  • Dergi Adı: INFORMATION SCIENCES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.44-63
  • Hacettepe Üniversitesi Adresli: Evet

Özet

This paper introduces the relations between covering and dicovering in the framework of rough sets. The natural counterpart of a covering in textures is given by a family of pairs of sets which is called a dicovering. This leads us to two dual concepts which are called star and co-star of a set, respectively. Here, we define dicovering approximation space and we discuss on covering and dicovering based rough sets. In this context, star corresponds to the upper approximation operator defined by Zakowski and co-star corresponds to the lower approximation operator studied by Pomykala, Yao, and Zhu and Wang. (C) 2011 Elsevier Inc. All rights reserved.