The distributivity characterization of idempotent null-uninorms over two special aggregation operators

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Zhang T.H.; Qin F.; Wan J.; Hu Q.M.

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Journal Paper

Paper Information

Journal: Iranian Journal of Fuzzy Systems Year:2023 | Volume:20 | Issue:2 Page(s): 103-119

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Title

The distributivity characterization of idempotent null-uninorms over two special aggregation operators

Author(s)

Zhang T.H. | Qin F. | Wan J. | Hu Q.M. | Issue Writer Certificate

Keywords

Distributivity equation

idempotent null-uninorms

associated function

idempotent uninorms overlap function

grouping function

Abstract

Recently, Zhao et al. \cite{Zhao-2021-25} characterized the distributivity equations of null-uninorms with continuous and Archimedean underlying operators over overlap or grouping functions. Moreover, Liu et al. \cite{Liu-2020-25} studied the distributive laws of continuous t-norms over overlap functions. In this paper, we proceed with the distributivity characterization of idempotent null-uninorms over overlap or grouping functions. In order to do that, we introduce a class of weak overlap and grouping functions with weak coefficients, and obtain the full characterizations of overlap and grouping functions by considering the different values of underlying uninorms' associated functions of idempotent null-uninorms on the interval endpoints and comparing them with the weak coefficients. Obviously, idempotent null-uninorms generalize idempotent uninorms. Thus, the obtained results also generalize the distributivity of idempotent uninorms proposed as future work in

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