Non-Monotone Traveling Waves of the Weak Competition Lotka-Volterra System
National Taiwan University(国立台湾大学);Scuola Internazionale Superiore di Studi Avanzati (SISSA)(高级国际研究学院);National Center for Theoretical Sciences(国家理论科学中心)
Chiun-Chuan Chen, Ting-Yang Hsiao, Shun-Chieh Wang
We investigate traveling wave solutions in the two-species reaction-diffusion Lotka-Volterra competition system under weak competition. For the strict weak competition regime $(b<a<1/c,\,d>0)$, we construct refined upper and lower solutions combined with the Schauder fixed point theorem to establish the existence of traveling waves for all wave speeds $s\geq s^*:=\max\{2,2\sqrt{ad}\}$, and provide verifiable sufficient conditions for the emergence of non-monotone waves. Such conditions for non-monotonic waves have not been explicitly addressed in previous studies. It is interesting to point out that our result for non-monotone waves also hold for the critical speed case $s=s^*$. In addition, in the critical weak competition case $(b<a=1/c,\,d>0)$, we rigorously prove, for the first time, the existence of front-pulse traveling waves.
Traveling Wave Solutions for Delayed Reaction-Diffusion Systems and Applications to Lotka-Volterra Competition-Diffusion Models with Distributed Delays
Lotka-Volterra competition models on finite graphs
本文研究了有限连通图上三个两种群竞争的Lotka-Volterra竞争模型,分别具有Dirichlet、Neumann和无边界条件.在Neumann边界条件和无边界条件下,当时间趋于无穷大时,种群中的一个种群灭绝而另一个种群生存,或者两个竞争种群共存,这主要取决于种群竞争力的强弱和种群初始规模.我们的一个结果部分回答了斯拉夫·勒克在[SIAM J. Appl. Dyn.系统:19(2020)]。证明主要结果的关键技术是上、下解方法,本文针对有限图上的弱耦合抛物型方程组发展了上、下解方法。
Propagation Direction of Bistable Traveling Fronts in the Lotka--Volterra Competition--Diffusion System
School of Mathematical Sciences, Shanghai Jiao Tong University(上海交通大学数学科学学院);Institute of Natural Sciences, Shanghai Jiao Tong University(上海交通大学自然科学研究院);Chern Institute of Mathematics, Nankai University(南开大学陈省身数学研究所)
Sharp Thresholds for Linear Determinacy and Zero Wave Speed in Lotka-Volterra Competition-Diffusion Systems
School of Mathematical Sciences, Shanghai Jiao Tong University(上海交通大学数学科学学院);Institute of Natural Sciences, Shanghai Jiao Tong University(上海交通大学自然博物馆);Chern Institute of Mathematics, Nankai University(南开大学陈省身数学研究所)