Abstract
The spatial logistic model is a system of point entities (particles) in \(\mathbb {R}^d\) which reproduce themselves at distant points (dispersal) and die, also due to competition. The states of such systems are probability measures on the space of all locally finite particle configurations. In this paper, we obtain the evolution of states of ‘finite systems’, that is, in the case where the initial state is supported on the subset of the configuration space consisting of finite configurations. The evolution is obtained as the global solution of the corresponding Fokker-Planck equation in the space of measures supported on the set of finite configurations. We also prove that this evolution preserves the existence of exponential moments and the absolute continuity with respect to the Lebesgue-Poisson measure.
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Acknowledgments
The author thanks Yuri Kondratiev for fruitful discussions on the subject of this work. He is also grateful for the support provided by the DFG through SFB 701: “Spektrale Strukturen und Topologische Methoden in der Mathematik”, by the ZiF Research Group “Stochastic Dynamics: Mathematical Theory and Applications” (Universität Bielefeld), and by the European Commission under the project STREVCOMS PIRSES-2013–612669.
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Kozitsky, Y. (2015). Dynamics of Spatial Logistic Model: Finite Systems. In: Banasiak, J., Bobrowski, A., Lachowicz, M. (eds) Semigroups of Operators -Theory and Applications. Springer Proceedings in Mathematics & Statistics, vol 113. Springer, Cham. https://doi.org/10.1007/978-3-319-12145-1_12
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DOI: https://doi.org/10.1007/978-3-319-12145-1_12
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