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Title: QL-implications versus D-implications (English)
Author: Mas, Margarita
Author: Monserrat, Miquel
Author: Torrens, Joan
Language: English
Journal: Kybernetika
ISSN: 0023-5954
Volume: 42
Issue: 3
Year: 2006
Pages: 351-366
Summary lang: English
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Category: math
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Summary: This paper deals with two kinds of fuzzy implications: QL and Dishkant implications. That is, those defined through the expressions $I(x,y) = S(N(x),T(x,y))$ and $I(x,y) = S(T(N(x),N(y)),y)$ respectively, where $T$ is a t-norm, $S$ is a t-conorm and $N$ is a strong negation. Special attention is due to the relation between both kinds of implications. In the continuous case, the study of these implications is focused in some of their properties (mainly the contrapositive symmetry and the exchange principle). Finally, the case of non continuous t-norms or non continuous t-conorms is studied, deriving new implications of both kinds and showing that they remain strongly connected. (English)
Keyword: t-norm
Keyword: T-conorm
Keyword: implication operator
Keyword: QL-implication
Keyword: D-implication
MSC: 03B52
MSC: 39B05
MSC: 94D05
idZBL: Zbl 1249.03026
idMR: MR2253394
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Date available: 2009-09-24T20:16:33Z
Last updated: 2015-03-28
Stable URL: http://hdl.handle.net/10338.dmlcz/135719
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