The Bramson correction for integro-differential Fisher–KPP equations

We consider integro-differential Fisher–KPP equations with nonlocal diffusion. For typical equations, we establish the logarithmic Bramson delay for solutions with step-like initial data. That is, these solutions resemble a front at position $c_\ast t - \frac{3}{2\lambda_\ast} \operatorname{log} t + \mathcal{O}(1)$ for explicit constants $c_\ast$ and $\lambda_\ast$. Certain strongly asymmetric diffusions exhibit more exotic behaviour.

Keywords

reaction-diffusion, integro-differential equation, Fisher–KPP, asymptotics

2010 Mathematics Subject Classification

35B40, 35K57, 60J80

The full text of this article is unavailable through your IP address: 3.141.21.106

Received 10 May 2020

Received revised 23 August 2021

Accepted 24 August 2021

Published 28 January 2022