Giachetti, Ronald E.; Young, Robert E. Analysis of the error in the standard approximation used for multiplication of triangular and trapezoidal fuzzy numbers and the development of a new approximation. (English) Zbl 0915.04003 Fuzzy Sets Syst. 91, No. 1, 1-13 (1997). Summary: Triangular and trapezoidal fuzzy numbers are commonly used in many applications. It is well known that the operators used for the nonlinear operations such as multiplication, division, and inverse are approximations to the actual operators. It is also commonly assumed that the error introduced by the approximations is small and acceptable. This paper examines the error of approximation for repeated use of the multiplication operand and shows it can be sufficiently large in simple circumstances to produce erroneous results. The computational complexity of the multiplication operation is analyzed and shown to be sufficiently complex that a computationally simpler approximation is needed. As a consequence, the error produced by the approximation for the multiplication operation is analyzed and a new approximation developed that is accurate for a large range of problems. An error expression is developed for the new approximation that can be used to determine when it is producing unacceptable results. Cited in 21 Documents MSC: 03E72 Theory of fuzzy sets, etc. Keywords:fuzzy arithmetic; triangular fuzzy numbers; trapezoidal fuzzy numbers; computational complexity; mutliplication approximation PDFBibTeX XMLCite \textit{R. E. Giachetti} and \textit{R. E. Young}, Fuzzy Sets Syst. 91, No. 1, 1--13 (1997; Zbl 0915.04003) Full Text: DOI