任意大偶数可表为两个奇素数之和(续)

Any Greater Even Number Can be Expressed as the Sum of Two Odd Prime Numbers(Continuation)

本文依据概率论的基本原理，提出了求证被筛集合的子集基数的一种新方法。非常简单有效，并用该方法证明了 card SB≥ pr/4。

In this paper,on the fundamentals of probability theory,I advance a new method to find the cardinal numbers of the subset of the aggregate which we are sieving.This method is very simple and efficacious.And I prove card SB≥ pr/4 by this method.