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Title: Fuzzy sets (in)equations with a complete codomain lattice (English)
Author: Stepanović, Vanja
Author: Tepavčević, Andreja
Language: English
Journal: Kybernetika
ISSN: 0023-5954 (print)
ISSN: 1805-949X (online)
Volume: 58
Issue: 2
Year: 2022
Pages: 145-162
Summary lang: English
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Category: math
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Summary: The paper applies some properties of the monotonous operators on the complete lattices to problems of the existence and the construction of the solutions to some fuzzy relational equations, inequations, and their systems, taking a complete lattice for the codomain lattice. The existing solutions are extremal - the least or the greatest, thus we prove some extremal problems related to fuzzy sets (in)equations. Also, some properties of upper-continuous lattices are proved and applied to systems of fuzzy sets (in)equations, in a special case of a meet-continuous complete codomain lattice. (English)
Keyword: fuzzy relations
Keyword: fuzzy set equations
Keyword: fuzzy set inequations
Keyword: monotonous operator
Keyword: upper continuous lattice
MSC: 03B52
MSC: 03E72
MSC: 06B23
idZBL: Zbl 07584150
idMR: MR4467490
DOI: 10.14736/kyb-2022-2-0145
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Date available: 2022-07-29T12:05:24Z
Last updated: 2023-03-13
Stable URL: http://hdl.handle.net/10338.dmlcz/150460
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