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Occupation Time Fluctuations of Weakly Degenerate Branching Systems

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  • Yuqiang Li

    (East China Normal University)

  • Yimin Xiao

    (Michigan State University)

Abstract

We establish limit theorems for rescaled occupation time fluctuations of a sequence of branching particle systems in ℝ d with anisotropic space motion and weakly degenerate splitting ability. In the case of large dimensions, our limit processes lead to a new class of operator-scaling Gaussian random fields with nonstationary increments. In the intermediate and critical dimensions, the limit processes have spatial structures analogous to (but more complicated than) those arising from the critical branching particle system without degeneration considered by Bojdecki et al. (Stoch. Process. Appl. 116:1–18 and 19–35, 2006). Due to the weakly degenerate branching ability, temporal structures of the limit processes in all three cases are different from those obtained by Bojdecki et al. (Stoch. Process. Appl. 116:1–18 and 19–35, 2006).

Suggested Citation

  • Yuqiang Li & Yimin Xiao, 2012. "Occupation Time Fluctuations of Weakly Degenerate Branching Systems," Journal of Theoretical Probability, Springer, vol. 25(4), pages 1119-1152, December.
    • Handle: RePEc:spr:jotpro:v:25:y:2012:i:4:d:10.1007_s10959-011-0358-3
    DOI: 10.1007/s10959-011-0358-3
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    References listed on IDEAS

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    1. Bojdecki, T. & Gorostiza, L.G. & Talarczyk, A., 2006. "Limit theorems for occupation time fluctuations of branching systems I: Long-range dependence," Stochastic Processes and their Applications, Elsevier, vol. 116(1), pages 1-18, January.
    2. Frédéric Lavancier, 2007. "Invariance principles for non-isotropic long memory random fields," Statistical Inference for Stochastic Processes, Springer, vol. 10(3), pages 255-282, October.
    3. Bojdecki, T. & Gorostiza, L.G. & Talarczyk, A., 2008. "Occupation time limits of inhomogeneous Poisson systems of independent particles," Stochastic Processes and their Applications, Elsevier, vol. 118(1), pages 28-52, January.
    4. Tomasz Bojdecki & Luis G. Gorostiza & Anna Talarczyk, 2004. "Sub-fractional Brownian motion and its relation to occupation times," RePAd Working Paper Series lrsp-TRS376, Département des sciences administratives, UQO.
    5. Li, Yuqiang & Xiao, Yimin, 2011. "Multivariate operator-self-similar random fields," Stochastic Processes and their Applications, Elsevier, vol. 121(6), pages 1178-1200, June.
    6. Bojdecki, T. & Gorostiza, L.G. & Talarczyk, A., 2006. "Limit theorems for occupation time fluctuations of branching systems II: Critical and large dimensions," Stochastic Processes and their Applications, Elsevier, vol. 116(1), pages 19-35, January.
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