Limit
Theorems for the Process of Exceedances in Large Populations
Bulletin of the Malaysian Mathematical Society, Tome 23 (2000) no. 1
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We consider a discrete time branching process with n initial ancestors. Each of the ancestors generates a branching process with the same of spring distribution. Let be the number of ancestors having more than descendants at time t . We prove that can, in a weak sense, be approximated as by either a Poisson or a Binomial process depending on the criticality of the initial process.