International Journal of Management and Fuzzy Systems

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Volume 6, Issue 1, March 2020

  • Alternative Determines Positivity of Hexagonal Fuzzy Numbers and Their Alternative Arithmetic

    Susmitha Harun, Mashadi Mashadi, Sri Gemawati

    Issue: Volume 6, Issue 1, March 2020
    Pages: 1-7
    Received: 1 April 2020
    Accepted: 28 April 2020
    Published: 9 June 2020
    DOI: 10.11648/j.ijmfs.20200601.11
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    Abstract: There are quite a lot of arithmetic operations for hexagonal fuzzy numbers, most of them only define positive fuzzy numbers and few are discussing negative fuzzy numbers. And rarely found inverse of a fuzzy hexagonal number. So, often the results obtained in a hexagonal fuzzy linear equation system are not compatible. In this paper, we will discus... Show More
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  • Entropy of Topological Space S and Evolution of Phase Space of Dynzmical Systems

    Malkhaz Mumladze

    Issue: Volume 6, Issue 1, March 2020
    Pages: 8-13
    Received: 26 April 2020
    Accepted: 1 June 2020
    Published: 15 June 2020
    DOI: 10.11648/j.ijmfs.20200601.12
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    Abstract: In this paper, we introduced the concept of pseudo-convex open covering of topological spaces and entropy for topological spaces with such covering. Entropy was previously defined only for open coverings of compact topological spaces. It is shown by examples that the classes of topological spaces for which the concept of entropy is defined is quite... Show More
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