The Fractionator Principle. The fractionator principle is one of the important concepts used in stereology. The importance of this principle cannot be overlooked. It appears in many different places. Although it looks different depending on how it is used, the principle is the same.
In mathematics, a variable whose value is determined by the value of an independent variable. For example, in the formula for the area of a circle, A = Ïr2, A is the dependent variable, as its value depends on the value of the radius (r). Compare independent variable.
The concepts have stemmed out into other fields, such as physics and computer science for this reason. More about Variable. In the mathematical context, a variable is a quantity which has a changing or a variable magnitude. Commonly (in algebra), it is represented by an English letter or a Greek letter. It is common practice to call this symbolic letter the variable.