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- Title
Splitting-particle methods for structured population models: Convergence and applications.
- Authors
Carrillo, J. A.; Gwiazda, P.; Ulikowska, A.
- Abstract
We propose a new numerical scheme designed for a wide class of structured population models based on the idea of operator splitting and particle approximations. This scheme is related to the Escalator Boxcar Train (EBT) method commonly used in biology, which is in essence an analogue of particle methods used in physics. Our method exploits the split-up technique, thanks to which the transport step and the nonlocal integral terms in the equation can be separately considered. The order of convergence of the proposed method is obtained in the natural space of finite non-negative Radon measures equipped with the flat metric. This convergence is studied even adding reconstruction and approximation steps in the particle simulation to keep the number of approximation particles under control. We validate our scheme in several test cases showing the theoretical convergence error. Finally, we use the scheme in situations in which the EBT method does not apply showing the flexibility of this new method to cope with the different terms in general structured population models.
- Subjects
PARTICLE methods (Numerical analysis); STOCHASTIC convergence; RADON measures; ERROR analysis in mathematics; APPROXIMATION theory; SIMULATION methods &; models; INTEGRALS
- Publication
Mathematical Models & Methods in Applied Sciences, 2014, Vol 24, Issue 11, p2171
- ISSN
0218-2025
- Publication type
Article
- DOI
10.1142/S0218202514500183