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Preimage Relations and Their Matrices

  • Jouni Järvinen
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 1424)

Abstract

Information systems (in the sense of Pawlak) are used for representing properties of objects by the means of attributes and their values. However, sometimes there are situations in which we cannot give an exact value of an attribute for an object; we can only approximate the incompletely known value by a subset of values, in which the actual value is expected to be.

Keywords

Binary Relation Information Relation Dence Space Abstract Setting Minimal Subset 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • Jouni Järvinen
    • 1
  1. 1.Department of MathematicsUniversity of TurkuTURKU

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