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Propagation dynamics of a reaction-diffusion equation in a time-periodic shifting environment
Journal de Mathématiques Pures et Appliquées ( IF 2.1 ) Pub Date : 2021-01-14 , DOI: 10.1016/j.matpur.2021.01.001 Jian Fang , Rui Peng , Xiao-Qiang Zhao
中文翻译:
时移环境下反应扩散方程的传播动力学
更新日期:2021-02-09
Journal de Mathématiques Pures et Appliquées ( IF 2.1 ) Pub Date : 2021-01-14 , DOI: 10.1016/j.matpur.2021.01.001 Jian Fang , Rui Peng , Xiao-Qiang Zhao
This paper concerns the nonautonomous reaction-diffusion equation where is the shifting speed, and the time periodic nonlinearity is asymptotically of KPP type as and is negative as . Under a subhomogeneity condition, we show that there is such that a unique forced time periodic wave exists if and only if and it attracts other solutions in a certain sense according to the tail behavior of initial values. In the case where , the propagation dynamics resembles that of the limiting system as , depending on the shifting direction.
中文翻译:
时移环境下反应扩散方程的传播动力学
本文涉及非自治反应扩散方程 哪里 是变速速度和时间周期非线性 渐近的KPP类型为 并为负 。在亚同质性条件下,我们表明 这样,当且仅当存在唯一的强制时间周期波 并且根据初始值的尾部行为在某种意义上吸引了其他解决方案。在这种情况下,传播动力学类似于极限系统的传播动力学 ,取决于移动方向。