measure
Mathematically, measure is a function that specifies a number for a subset of a given set, which can be compared to size, volume, probability, and so on. The traditional points are carried out in the interval, and later people want to promote the points to any set, the development of the concept of measurement, it is in mathematical analysis and probability theory has an important position. The measure theory is a branch of real analysis, and the object of study has σ algebra, measure, measurable function and integral, and its importance is embodied in probability theory and statistics. ...