Semi-wave and spreading speed of the nonlocal Fisher-KPP equation with free boundaries

Author(s)
Du, Yihong
Li, Fang
Zhou, Maolin
Publication Date
2021-10
Abstract
<p>In Cao, Du, Li and Li [9], a nonlocal diffusion model with free boundaries extending the local diffusion model of Du and Lin [18] was introduced and studied. For Fisher-KPP type nonlinearities, its long-time dynamical behaviour is shown to follow a spreading-vanishing dichotomy. However, when spreading happens, the question of spreading speed was left open in [9]. In this paper we obtain a rather complete answer to this question. We find a threshold condition on the kernel function such that spreading grows linearly in time exactly when this condition holds, which is achieved by completely solving the associated semi-wave problem that determines this linear speed; when the kernel function violates this condition, we show that accelerated spreading happens.</p>
Citation
Journal de Mathematiques Pures et Appliquees, v.154, p. 30-66
ISSN
1776-3371
0021-7824
Link
Publisher
Elsevier Masson
Title
Semi-wave and spreading speed of the nonlocal Fisher-KPP equation with free boundaries
Type of document
Journal Article
Entity Type
Publication

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