On modularity property for uninorms with continuous underlying functions

Document Type : Research Paper

Authors

Nanchang University

Abstract

In literature, for the four common classes of uninorms, the modularity equation has been solved except for the kind of ones having continuous underlying functions. This paper is devoted to solving the modularity equation involving two uninorms with continuous underlying functions.
We discuss this modularity equation in detail by dividing the main section into two parts. The structure characterization of the two uninorms is almost completely obtained and it is found that they are equal in the unit square except in a subdomain.

Keywords

Main Subjects


[1] B. De. Baets, Idempotent uninorms, European Journal of Operational Research, 118 (1999), 631-642. https:
//doi.org/10.1016/S0377-2217(98)00325-7
[2] B. De Baets, J. Fodor, Van Melles combining function in MYCIN is a representable uninorm: An alternative proof,
Fuzzy Sets and Systems, 104 (1999), 133-156. https://doi.org/10.1016/S0165-0114(98)00265-6
[3] P. Dryga´s, On properties of uninorms with underlying t-norm and t-conorm given as ordinal sums, Fuzzy Sets and
Systems, 161 (2010), 47-57. https://doi.org/10.1016/j.fss.2009.09.017
[4] Q. Feng, Uninorms solutions and (or) nullnorm solutions to the modularity condition equations, Fuzzy Sets and
Systems, 148 (2004), 231-242. https://doi.org/10.1016/j.fss.2004.04.012
[5] J. Fodor, B. De. Baets, A single-point characterization of representable uninorms, Fuzzy Sets and Systems, 202
(2012), 89-99. https://doi.org/10.1016/j.fss.2011.12.001
[6] J. Fodor, R. R. Yager, A. Rybalov, Structure of uninorms, International Journal of Uncertainty Fuzziness and
Knowledge-based Systems, 5 (1997), 411-427. https://doi.org/10.1142/S0218488597000312
[7] S. K. Hu, Z. F. Li, The structure of continuous uninorms, Fuzzy Sets and Systems, 124(1) (2001), 43-52. https:
//doi.org/10.1016/S0165-0114(00)00044-0
[8] E. P. Klement, R. Mesiar, E. Pap, Triangular norms, Kluwer Academic Publishers, Dordrecht, 2000. https:
//doi.org/10.1007/978-94-015-9540-7
[9] G. J. Klir, B. Yuan, Fuzzy sets and fuzzy logic: Theory and applications, Prentice Hall PTR, Upper Saddle River,
New Jersey, 1995.
[10] G. Li, H. W. Liu, Distributivity and conditional distributivity of a uninorm with continuous underlying operators
over a continuous t-conorm, Fuzzy Sets and Systems, 287 (2016), 154-171. https://doi.org/10.1016/j.fss.
2015.01.019
[11] G. Li, H. W. Liu, J. Fodor, Single-point characterization of uninorms with nilpotent underlying t-norm and tconorm,
International Journal of Uncertainty Fuzziness and Knowledge-based Systems, 22 (2014), 591-604. https:
//doi.org/10.1142/S0218488514500299
[12] W. H. Li, F. Qin, Conditional distributivity equation for uninorms with continuous underlying operators, IEEE
Transactions on Fuzzy Systems, 8 (2020), 1664-1678. https://doi.org/10.1109/TFUZZ.2019.2920809
[13] M. Mas, G. Mayor, J. Torrens, The modularity condition for uninorms and t-operators, Fuzzy Sets and Systems,
126 (2002), 207-218. https://doi.org/10.1016/S0165-0114(01)00055-0
[14] M. Mas, M. Monserrat, D. Ruiz-Aguilera, Migrative uninorms and nullnorms over t-norms and t-conorms, Fuzzy
Sets and Systems, 15 (2015), 20-32. https://doi.org/10.1016/j.fss.2014.05.012
[15] A. Mesiarov´a-Zem´ankov´a, Characterization of uninorms with continuous underlyning t-norm and t-conorms by the
set of discontinuity points, IEEE Transactions on Fuzzy Systems, 26 (2018), 705-714. https://doi.org/10.1016/
j.ijar.2017.01.007
[16] C. Pedrycz, Logic-based fuzzy neurocomputing with unineurons, IEEE Transactions on Fuzzy Systems, 14 (2006),
860-873. https://doi.org/10.1109/TFUZZ.2006.879977
[17] M. Petr´ık, R. Mesiar, On the structure of special classes of uninorms, Fuzzy Sets and Systems, 240 (2014), 22-38.
https://doi.org/10.1016/j.fss.2013.09.013
[18] D. Ruiz-Aguilera, J. Torrens, La condici´on de modularidad para uninormas idempotentes, in Proceedings of the
XI Congreso Espa˘nol sobre Tecnolog´ıasy L´ogica Fuzzy (ESTYLF-02), Le´on, Espa˘na, (2002), 177-182 (in Spanish).
http://eudml.org/doc/33683
[19] D. Ruiz-Aguilera, J. Torrens, Distributivity and conditional distributivity of a uninorm and a continuous t-conorm,
IEEE Transactions on Fuzzy Systems, 14 (2006), 180-190. https://doi.org/10.1109/TFUZZ.2005.864087
[20] Y. Su, H. W. Liu, J. V. Riera, D. R. Aguilera, J. Torrens, The modularity condition for uninorms revisited, Fuzzy
Sets and Systems, 357 (2019), 27-46. https://doi.org/10.1016/j.fss.2018.02.008
[21] Y. Su, H. W. Liu, J. V. Riera, D. Ruiz, J. Torrens, The distributivity equation for uninorms revisited, Fuzzy Sets
and Systems, 334 (2018), 1-23. https://doi.org/10.1016/j.fss.2016.11.015
[22] Y. Su, H. W. Liu, D. Ruiz, J. V. Riera, J. Torrens, On the distributivity property for uninorms, Fuzzy Sets and
Systems, 287 (2016), 184-202. https://doi.org/10.1016/j.fss.2015.06.023
[23] Y. Su, W. W. Zong, P. Dryga´s, Properties of uninorms with the underlying operators given as ordinal sums, Fuzzy
Sets and Systems, 357 (2019), 47-57. https://doi.org/10.1016/j.fss.2018.04.011
[24] Y. Su, W. W. Zong, H. W. Liu, Migrativity property for uninorms, Fuzzy Sets and Systems, 287 (2016), 172-183.
https://doi.org/10.1016/j.fss.2015.05.018
[25] R. R. Yager, Uninorms in fuzzy system modelling, Fuzzy Sets and Systems, 122 (2001), 167-175. https://doi.
org/10.1016/S0165-0114(00)00027-0
[26] R. R. Yager, A. Rybalov, Uninorm aggregation operators, Fuzzy Sets and Systems, 180 (1996), 111-120. https:
//doi.org/10.1016/0165-0114(95)00133-6
[27] H. Zhan, Y. M. Wang, H. W. Liu, The modularity condition for semi-t-operators, Fuzzy Sets and Systems, 346
(2018), 108-126. https://doi.org/10.1016/j.fss.2017.05.025
[28] Y. Y. Zhao, H. W. Liu, The modularity equation for semi-t-operators and T-uninorms, International Journal of
Approximate Reasoning, 146 (2022), 106-118. https://doi.org/10.1016/j.ijar.2022.04.005
[29] Y. Y. Zhao, H. Zhan, H. W. Liu, The modularity equation of Mayoris aggregation operators and semi-t-operators,
Fuzzy Sets and Systems, 403 (2021), 101-118. https://doi.org/10.1016/j.fss.2020.01.010
[30] K. Y. Zhu, J. R. Wang, Y. W. Yang, New results on the modularity condition for overlap and grouping functions,
Fuzzy Sets and Systems, 403 (2021), 139-147. https://doi.org/10.1016/j.fss.2019.10.014