THE GROWTH AND SPREAD OF THE GENERAL BRANCHING RANDOM WALK

被引:32
作者
Biggins, J. D. [1 ]
机构
[1] Univ Sheffield, Sch Math & Stat, Probabil & Stat Sect, Sheffield S3 7RH, S Yorkshire, England
关键词
Spatial spread; asymptotic speed; propagation rate; CMJ process;
D O I
10.1214/aoap/1177004604
中图分类号
O21 [概率论与数理统计]; C8 [统计学];
学科分类号
020208 ; 070103 ; 0714 ;
摘要
A general (Crump-Mode-Jagers) spatial branching process is considered. The asymptotic behavior of the numbers present at time t in sets of the form [ta, infinity) is obtained. As a consequence it is shown that if B-t is the position of the rightmost person at time t, B-t/t converges to a constant, which can be obtained from the individual reproduction law, almost surely on the survival set of the process. This generalizes the known discrete-time results.
引用
收藏
页码:1008 / 1024
页数:17
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