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A new distance measure for trapezoidal fuzzy numbers. (English) Zbl 1296.03029

Summary: We propose a new distance measure for the space of all trapezoidal fuzzy numbers using centroid point and left/right spread of trapezoidal fuzzy numbers. Moreover, the metric properties of suggested distance measure are investigated. Indeed, we show that for two arbitrary trapezoidal fuzzy numbers if the distance between centroid points and also the distance between left spreads and right spreads go to zero, then two given fuzzy numbers are equal. Consequently, we complete discussion about the relation between fuzzy number and its centroid which is the firstly discussed by A. Hadi-Vencheh and M. Allame [Comput. Math. Appl. 59, No. 11, 3578–3582 (2010; Zbl 1197.26051)]. To the best of our knowledge, this is first time in the literature that such metric is applied by centroid point.

MSC:

03E72 Theory of fuzzy sets, etc.
26E50 Fuzzy real analysis

Citations:

Zbl 1197.26051
Full Text: DOI

References:

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