Abstract
We develop general heterogeneous nonlocal diffusion models and investigate their connection to local diffusion models by taking a singular limit of focusing kernels. We reveal the link between the two groups of diffusion equations which include both spatial heterogeneity and anisotropy. In particular, we introduce the notion of deciding factors which single out a nonlocal diffusion model and typically consist of the total jump rate and the average jump length. In this framework, we also discuss the dependence of the profile of the steady state solutions on these deciding factors, thus shedding light on the preferential position of individuals.
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Acknowledgements
The authors are grateful to the anonymous referees whose precise comments have improved the presentation of the results. Matthieu Alfaro and Gwenaël Peltier are supported by the ANR project DEEV ANR-20-CE40-0011-01. Thomas Giletti is supported by the ANR Project JCJC ANR-21-CE40-0008. Hyowon Seo is supported by NRF of Korea (no. 2020R1I1A1A01069585). The authors also acknowledge support from CNRS International Research Network ReaDiNet.
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Alfaro, M., Giletti, T., Kim, YJ. et al. On the modelling of spatially heterogeneous nonlocal diffusion: deciding factors and preferential position of individuals. J. Math. Biol. 84, 38 (2022). https://doi.org/10.1007/s00285-022-01738-y
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DOI: https://doi.org/10.1007/s00285-022-01738-y