On testing membership to maximal consistent extensions of information systems

  • Authors:
  • Mikhail Moshkov;Andrzej Skowron;Zbigniew Suraj

  • Affiliations:
  • Institute of Computer Science, University of Silesia, Sosnowiec, Poland;Institute of Mathematics, Warsaw University, Warsaw, Poland;Chair of Computer Science, Rzeszów University, Rzeszów, Poland

  • Venue:
  • RSCTC'06 Proceedings of the 5th international conference on Rough Sets and Current Trends in Computing
  • Year:
  • 2006

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Abstract

This paper provides a new algorithm for testing membership to maximal consistent extensions of information systems. A maximal consistent extension of a given information system includes all objects corresponding to known attribute values which are consistent with all true and realizable rules extracted from the original information system. An algorithm presented here does not involve computing any rules, and has polynomial time complexity. This algorithm is based on a simpler criterion for membership testing than the algorithm described in [4]. The criterion under consideration is convenient for theoretical analysis of maximal consistent extensions of information systems.