For convenience, objects of class '>PowerFuzzyNumber
may be created with this function.
PowerFuzzyNumber(a1, a2, a3, a4, p.left = 1, p.right = 1)a number specyfing left bound of the support
a number specyfing left bound of the core
a number specyfing right bound of the core
a number specyfing right bound of the support
a positive number specyfing the exponent for the left side
a positive number specyfing the exponent for the right side
Other PowerFuzzyNumber-method: 
Extract,
PowerFuzzyNumber-class,
alphaInterval(),
as.PowerFuzzyNumber(),
as.TrapezoidalFuzzyNumber(),
as.character(),
expectedInterval()