摘要
计算出一类特殊的随机环境中的分枝过程概率母函数的一般表达式，从而得出灭绝时间的分布．
A class of branching processes in random environment (BPRE) was studied In this paper,We have gotten the expressions about probability generating function of BPRE and the distribution of extinction time.
关键词
随机环境
分枝过程
概率母函数
灭绝时间
Random environment Branching processes Probability generating function Extinction time
