Abstract
This paper is devoted to studying the asymptotic behavior of the solution to nonlocal Fisher-KPP type reaction diffusion equations in heterogeneous media. The kernel K is assumed to depend on the media. First, we give an estimate of the upper and lower spreading speeds by generalized principal eigenvalues. Second, we prove the existence of spreading speeds in the case where the media is periodic or almost periodic by showing that the upper and lower generalized principal eigenvalues are equal.
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Supported by the National Natural Science Foundation of China (Grant Nos. 11971454 and 12001514), the Fundamental Research Funds for the Central Universities and the Japan Society for the Promotion of Science
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Liang, X., Zhou, T. Spreading Speeds of Nonlocal KPP Equations in Heterogeneous Media. Acta. Math. Sin.-English Ser. 38, 161–178 (2022). https://doi.org/10.1007/s10114-022-0452-8
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DOI: https://doi.org/10.1007/s10114-022-0452-8