Branching Processes And Extinction Time In Random Environment

The concepts of branching process in random environment are introduced,and wemainly study theorem of equivalence , limit theorem and extinction time.In the firstchapter,we introduce the history of developing and some mainly result for branchingprocess;The second chapter is about the theorem of equivalence and limit theorem forbranching process in random environment;In the last chapter,we discuss the extinctiontime of subcritical branching processes in random environment.