Limit distributions for minimal displacement of branching random walks
Limit distributions for minimal displacement of branching random walks
复制标题
分支随机游走最小位移的极限分布
DOI:
10.1007/bf01193752
复制
发表时间:
1991
影响因子:
2
通讯作者:
B. Host
中科院分区:
文献类型:
--
作者:
F. Dekking;B. Host
SummaryWe study the minimal displacement (Xn) of branching random walk with non-negative steps. It is shown that (Xn−EXn) is tight under a mild moment condition on the displacements. For supercritical B.R.W. (Xn) converges almost surely. For critical B.R.W. we determine the possible limit points of (Xn−EXn), and we prove a generalization of Kolmogorov's theorem on the extinction probability of a critical branching process. Finally we generalize Bramson's results on the almost sure convergence ofXn log 2/log logn.