Reference points and roughness

  • Authors:

  • Babushri Srinivas Kedukodi;Syam Prasad Kuncham;Satyanarayana Bhavanari

  • Affiliations:

  • Department of Mathematics, Manipal Institute of Technology, Manipal University, Manipal, Karnataka 576104, India;Department of Mathematics, Manipal Institute of Technology, Manipal University, Manipal, Karnataka 576104, India;Department of Mathematics, Acharya Nagarjuna University, Nagarjuna Nagar, Andhra Pradesh 522510, India

  • Venue:
  • Information Sciences: an International Journal
  • Year:
  • 2010

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Abstract

In this paper, we introduce the notion of a reference point and provide local approximations for a subset of the universe. The notion of a reference point naturally gives rise to a rough approximations framework, wherein several approximations are possible on the same set. Also, we present an extension to the decision theoretic rough set model by using reference points.