Composite Gauss-Legendre Formulas for Solving Fuzzy Integration

Table 1

Numerical solutions and errors between different methods (ℎ=1).

Methods	Numerical solution	Error
Trapezoidal formula	0.68393972(−1+𝑟,1−𝑟)	0.05181917
Simpson formula	0.63233368(−1+𝑟,1−𝑟)	0.00021303
Two-point Gauss-L	0.63197875(−1+𝑟,1−𝑟)	0.00014180
Three-point Gauss-L	0.63212025(−1+𝑟,1−𝑟)	0.00000040