Abstract
It is shown that the number of cells alive at time $t$, denoted by $Z_0(t)$, of a critical age dependent branching process with immigration satisfies $t^{-1}Z_0(t)$ approaches a gamma law with specified constants in distribution.
Citation
Howard J. Weiner. "A Critical Age-Dependent Branching Process with Immigration." Ann. Math. Statist. 43 (6) 2099 - 2103, December, 1972. https://doi.org/10.1214/aoms/1177690892
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