随机变量相互独立与不相关之间关系的推广

The extension of the relation between independence and non correlation of a random variable

讨论了随机变量独立与不相关之间的联系，并对两个随机变量之间的独立与不相关性进行了细致的论证；引入了高阶不相关性，并证明了高阶不相关与独立的等价性．

The relation between independence and non correlation of a random variable is discussed, and the relation between two random variables is described in detail. At the same time, we have discussed the high level non correlation, and proved the equality between high level non correlation and independence.