Properties of the Fourth Type of Covering-Based Rough Sets

  • Authors:
  • William Zhu

  • Affiliations:
  • University of Auckland, New Zealand

  • Venue:
  • HIS '06 Proceedings of the Sixth International Conference on Hybrid Intelligent Systems
  • Year:
  • 2006

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Abstract

In the covering-based generalized rough set setting, lower and upper approximation operations generated by a covering do not satisfy some of common properties of classical lower and upper approximation operations. In this paper we investigate conditions for a covering under which these properties hold for the fourth type of covering-based lower and upper approximation operations.