条件改变下抽球结果的不变性问题及其应用

An unchangeable problem about the sequence of driving ball under the varible condition and its application

本文通过对两个引理、一个定理、一个推广的探讨,得出了一类不论条件怎样改变,抽球结果都只与初始时罐中球的比重有关这一重要结论,并给出了这一结论的应用。

This article dicusses two introductory theories, one theory and its application, then draws an important conclusion that the sequenece of driving ball only connects with the ball's proportion at the beginning. What's more, it provided the application of the conclusion.