# English, Article edition: ORDINAL SUMS IN INTERVAL-VALUED FUZZY SET THEORY GLAD DESCHRIJVER

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• article
Language
• English

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Title
• ORDINAL SUMS IN INTERVAL-VALUED FUZZY SET THEORY
Author
Physical Description
• article
Notes
• Interval-valued fuzzy sets form an extension of fuzzy sets which assign to each element of the universe a closed subinterval of the unit interval. This interval approximates the "real", but unknown, membership degree. In fuzzy set theory, an important class of triangular norms is the class of those that satisfy the residuation principle. A method for constructing t-norms that satisfy the residuation principle is by using the ordinal sum theorem. In this paper, we construct the ordinal sum of t-norms on $\mathcal{L}^I$, where $\mathcal{L}^I$ is the underlying lattice of interval-valued fuzzy set theory, in such a way that if the summands satisfy the residuation principle, then the ordinal sum does too.
• Interval-valued fuzzy set, t-norm on $\mathcal{L}^I$, residuation principle, ordinal sum
• RePEc:wsi:nmncxx:v:01:y:2005:i:02:p:243-259
Language
• English
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