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Sharpness in the Fuzzy World

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Relational and Algebraic Methods in Computer Science (RAMiCS 2020)

Part of the book series: Lecture Notes in Computer Science ((LNTCS,volume 12062))

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Abstract

In this paper we focus on a fuzzy version of the so-called (un)sharpness property of relational products in arrow/fuzzy categories. It is shown that the fuzzy version can be reduced to a regular (un)sharpness problem. As a consequence we obtain that relational products are also sharp in the fuzzy sense if all relational products and powers exist. This result is important in applications of arrow/fuzzy categories since relational products, and, hence, the fuzzy version of the (un)sharpness problem, are integral components of these applications.

The author gratefully acknowledges support from the Natural Sciences and Engineering Research Council of Canada (283267).

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References

  1. Desharnais, J.: Monomorphic characterization of \(n\)-ary direct products. Inf. Sci. 119(3–4), 275–288 (1999)

    Article  MathSciNet  Google Scholar 

  2. Furusawa, H., Kahl, W.: A Study on Symmetric Quotients. University of the Federal Armed Forces Munich, Bericht Nr. 1998–06 (1998)

    Google Scholar 

  3. Freyd, P., Scedrov, A.: Categories, Allegories. North-Holland Mathematical Library, vol. 39. North-Holland, Amsterdam (1990)

    Google Scholar 

  4. Kawahara, Y., Furusawa, H.: Crispness and representation theorems in Dedekind categories. DOI-TR 143, Kyushu University (1997)

    Google Scholar 

  5. Maddux, R.: On the derivation of identities involving projection functions. In: Csirmaz, L., Gabbay, D., de Rijke, M. (eds.) Logic Colloquium ’92. Studies in Logic, Languages, and Information, pp. 143–163. CSLI Publications (1995)

    Google Scholar 

  6. Imangazin, N., Winter, M.: A Relation-Algebraic Approach to \(L\)-Fuzzy Topology. Submitted to Relational and Algebraic Methods in Computer Science (RAMiCS 2019) (2019)

    Google Scholar 

  7. Olivier, J.P., Serrato, D.: Catégories de Dedekind. Morphismes dans les Catégories de Schröder. C.R. Acad. Sci. Paris 290, 939–941 (1980)

    Google Scholar 

  8. Olivier, J.P., Serrato, D.: Squares and rectangles in relational categories - three cases: semilattice, distributive lattice and Boolean non-unitary. Fuzzy Sets Syst. 72, 167–178 (1995)

    Article  Google Scholar 

  9. Schmidt, G., Ströhlein, T.: Relations and Graphs. Springer, Berlin (1993). https://doi.org/10.1007/978-3-642-77968-8

    Book  MATH  Google Scholar 

  10. Schmidt, G.: Relational Mathematics. Cambridge University Press, Cambridge (2011)

    MATH  Google Scholar 

  11. Schmidt, G., Winter, M.: Relational Topology. LNM, vol. 2208. Springer, Heidelberg (2018). https://doi.org/10.1007/978-3-319-74451-3

  12. Winter, M.: A new algebraic approach to \(L\)-fuzzy relations convenient to study crispness. INS Inf. Sci. 139, 233–252 (2001)

    Article  MathSciNet  Google Scholar 

  13. Winter, M.: Goguen Categories - A Categorical Approach to \(L\)-fuzzy Relations. Springer, Berlin (2007). https://doi.org/10.1007/978-1-4020-6164-6

    Book  MATH  Google Scholar 

  14. Winter, M.: Arrow categories. Fuzzy Sets Syst. 160, 2893–2909 (2009)

    Article  MathSciNet  Google Scholar 

  15. Winter, M.: Membership values in arrow categories. Fuzzy Sets Syst. 267, 41–61 (2015)

    Article  MathSciNet  Google Scholar 

  16. Winter, M.: Type-n arrow categories. In: Höfner, P., Pous, D., Struth, G. (eds.) RAMICS 2017. LNCS, vol. 10226, pp. 307–322. Springer, Cham (2017). https://doi.org/10.1007/978-3-319-57418-9_19

    Chapter  Google Scholar 

  17. Winter, M.: T-norm based operations in arrow categories. In: Desharnais, J., Guttmann, W., Joosten, S. (eds.) RAMiCS 2018. LNCS, vol. 11194, pp. 70–86. Springer, Cham (2018). https://doi.org/10.1007/978-3-030-02149-8_5

    Chapter  Google Scholar 

  18. Zierer, H.: Programmierung mit Funktionsobjekten: Konstruktive Erzeugung semantischer Bereiche und Anwendung auf die partielle Auswertung. Dissertation, TU München, TUM-I8803 (1988)

    Google Scholar 

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Winter, M. (2020). Sharpness in the Fuzzy World. In: Fahrenberg, U., Jipsen, P., Winter, M. (eds) Relational and Algebraic Methods in Computer Science. RAMiCS 2020. Lecture Notes in Computer Science(), vol 12062. Springer, Cham. https://doi.org/10.1007/978-3-030-43520-2_20

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  • DOI: https://doi.org/10.1007/978-3-030-43520-2_20

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-43519-6

  • Online ISBN: 978-3-030-43520-2

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