n-type Markov Branching Processes with Immigration

TL;DR

This paper analyzes n-type Markov branching processes with immigration and resurrection, providing explicit extinction probabilities, recurrence criteria, and decay properties, advancing understanding of their long-term behavior and invariant measures.

Contribution

It introduces new methods for explicit extinction probability calculation and detailed analysis of decay and invariant measures in n-type Markov branching processes.

Findings

Explicit extinction probability expression derived

Recurrence and ergodicity criteria established

Decay parameter and invariant measures calculated

Abstract

In this paper, we consider $n$-type Markov branching processes with immigration and resurrection. The uniqueness criteria are first established. Then, a new method is found and the explicit expression of extinction probability is successfully obtained in the absorption case, the mean extinction time is also given. The recurrence and ergodicity criteria are given if the state ${\bf 0}$ is not absorptive. Finally, if the resurrection rates are same as the immigration rates, the branching property and decay property are discussed in detail, it is shown that the process is a superimposition of a $n$-type branching process and an immigration. The exact value of the decay parameter $\lambda_Z$ is given for the irreducible class ${\bf Z}_+^n$. Moreover, the corresponding $\lambda_Z$-invariant measures/vectors and quasi-distributions are presented.