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A New Method for Determining of Extensions and Restrictions of Information Systems

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Rough Sets and Current Trends in Computing (RSCTC 2002)

Part of the book series: Lecture Notes in Computer Science ((LNAI,volume 2475))

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Abstract

The aim of the paper is presentation of some results that concern consistent extensions and consistent restrictions of information systems and decision systems. It is possible to determine them on the base of knowledge contained in rules generated from a given information (decision) system. The paper presents a way of consistent extensions and consistent restrictions determining, different from the one mentioned above. The paper contains also the definitions of notions of strict consistent extension (restriction) system and a necessary and sufficient condition for the existence of them for information (decision) system.

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References

  1. Pawlak, Z.: Rough sets: Theoretical Aspects of Reasoning About Data, Boston, MA, Kluwer Academic Publishers, 1991

    MATH  Google Scholar 

  2. Suraj, Z.: Rough Set Methods for the Synthesis and Analysis of Concurrent Processes, in: Studies in Fuzziness and Soft Computing, Rough Set Methods and Applications. New Developments in Knowledge Discovery in Information Systems, L. Polkowski, S. Tsumoto, T.Y. Lin (Eds.), Physica-Verlag, Heidelberg, 2000, 379–488

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  3. Suraj, Z.: Some Remarks on Extensions and Restrictions of Information Systems. Proceedings of the Second International Conference on Rough Sets and Current Trends in Computing (RSCTC’2000), Banff, Canada, October 16–19, 2000, 172–179

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  4. Wegener, I.: The complexity of Boolean Functions, Wiley and B.G. Teubner Stuttgart 1987

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Author information

Authors and Affiliations

  1. Institute of Mathematics, University of Rzeszow, Rejtana 16A, 35-310, Rzeszow, Poland

    Wojciech Rzcasa

  2. Chair of Computer Science Foundations, University of Information Technology and Management, H. Sucharskiego 2, 35-225, Rzeszow, Poland

    Zbigniew Suraj

Authors
  1. Wojciech Rzcasa
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  2. Zbigniew Suraj
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Editor information

Editors and Affiliations

  1. Penn State Great Valley School of Professional Graduate Studies, 30 East Swedesford Road, Malvern, PA, 19355, USA

    James J. Alpigini

  2. Department of Electrical and Computer Engineering, University of Manitoba, Winnipeg, MB, R3T 5V6, Canada

    James F. Peters

  3. Institute of Mathematics, Warsaw University, Banacha 2, 02-097, Warsaw, Poland

    Andrzej Skowron

  4. Department of Systems and Information Engineering, Maebashi Institute of Technology, 460-1 Kamisadori-Cho, Maebashi-City, 371-0816, Japan

    Ning Zhong

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© 2002 Springer-Verlag Berlin Heidelberg

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Rzcasa, W., Suraj, Z. (2002). A New Method for Determining of Extensions and Restrictions of Information Systems. In: Alpigini, J.J., Peters, J.F., Skowron, A., Zhong, N. (eds) Rough Sets and Current Trends in Computing. RSCTC 2002. Lecture Notes in Computer Science(), vol 2475. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-45813-1_25

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  • DOI: https://doi.org/10.1007/3-540-45813-1_25

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-44274-5

  • Online ISBN: 978-3-540-45813-5

  • eBook Packages: Springer Book Archive

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