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Scaling Limits for Crump-Mode-Jagers Processes with Immigration via Stochastic Volterra Equations

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arxiv 1809.05931 v3 pith:XFTHVYAB submitted 2018-09-16 math.PR

classification math.PR
keywords immigrationprocessescrump-mode-jagersbranchingclassequationslimitsmechanism
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In this paper, we firstly give a reconstruction for Crump-Mode-Jagers processes with immigration as solutions to a class of stochastic Volterra integral equations, which offers us a new insight for the evolution dynamics of age-dependent population. Based on this new representation, we prove the weak convergence of rescaled Crump-Mode-Jagers processes with immigration to a class of continuous-state branching processes with immigration. Moreover, the limits reveal that the individual law mainly changes the branching mechanism and immigration mechanism proportionally. This covers the results obtained by Lambert et al. [35] for subcritical binary Crump-Mode-Jagers processes.

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  1. Functional Limit Theorems for Marked Hawkes Point Measures

    math.PR 2019-08 conditional novelty 7.0 of 10

    The rescaled marked Hawkes point measure with immigration converges to a Gaussian white noise plus a Brownian-motion lifting, and the shot noise converges to a Brownian martingale.

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