Special Session 138: Differential Equations and Applications to Biology

Propagation dynamics of non-cooperative systems and applications to delayed equations
Guo Lin
Lanzhou University
Peoples Rep of China
Co-Author(s):    
Abstract:
In this talk, we first study the propagation dynamics of the following system \begin{equation}\label{1} \begin{cases} \frac{\partial S(x,t)}{\partial t} =d \frac{\partial^2S(x,t)}{\partial x^2}+f(N(x,t))-\mu S(x,t)-\beta S(x,t)I(x,t), \ \frac{\partial I(x,t)}{\partial t} =d \frac{\partial^2I(x,t)}{\partial x^2}+\beta S(x,t)I(x,t)-(\mu +\gamma )I(x,t)+\delta R(x,t), \ \frac{\partial R(x,t)}{\partial t} =d \frac{\partial^2R(x,t)}{\partial x^2}+\gamma I(x,t)-(\mu +\delta )R(x,t), \end{cases} \end{equation} in which $x\in\mathbb{R}, t>0, $ $N(x,t)=S(x,t)+I(x,t)+R(x,t)$, and all parameters are positive. We investigate the spreading speeds and traveling waves if $N$ has a wave form. Then the idea is utilized to study the propagation dynamics of the following delayed equation \[ \frac{\partial u(x,t)}{\partial t}=\frac{\partial ^{2}u(x,t)}{\partial x^{2}}+u(x,t)F(x+ct,u(x,t),(J*u)(x,t)),\quad x\in\mathbb{R},t>0. \]