数学物理学报(英文版) ›› 2020, Vol. 40 ›› Issue (5): 1459-1476.doi: 10.1007/s10473-020-0517-7

• 论文 • 上一篇    下一篇

INVASION TRAVELING WAVES FOR A DISCRETE DIFFUSIVE RATIO-DEPENDENT PREDATOR-PREY MODEL

苏涛, 张国宝   

  1. Colloge of Mathematics and Statistics, Northwest Normal University, Lanzhou 730070, China
  • 收稿日期:2018-10-29 修回日期:2020-02-24 出版日期:2020-10-25 发布日期:2020-11-04
  • 通讯作者: Guobao ZHANG E-mail:zhanggb2011@nwnu.edu.cn
  • 作者简介:Tao SU,E-mail:970913788@qq.com
  • 基金资助:
    This work was supported by NSF of China (11861056), Gansu Provincial Natural Science Foundation (18JR3RA093).

INVASION TRAVELING WAVES FOR A DISCRETE DIFFUSIVE RATIO-DEPENDENT PREDATOR-PREY MODEL

Tao SU, Guobao ZHANG   

  1. Colloge of Mathematics and Statistics, Northwest Normal University, Lanzhou 730070, China
  • Received:2018-10-29 Revised:2020-02-24 Online:2020-10-25 Published:2020-11-04
  • Contact: Guobao ZHANG E-mail:zhanggb2011@nwnu.edu.cn
  • Supported by:
    This work was supported by NSF of China (11861056), Gansu Provincial Natural Science Foundation (18JR3RA093).

摘要: This article is concerned with the existence of traveling wave solutions for a discrete diffusive ratio-dependent predator-prey model. By applying Schauder's fixed point theorem with the help of suitable upper and lower solutions, we prove that there exists a positive constant $c^{*}$ such that when $c>c^{*}$, the discrete diffusive predator-prey system admits an invasion traveling wave. The existence of an invasion traveling wave with $c=c^{*}$ is also established by a limiting argument and a delicate analysis of the boundary conditions. Finally, by the asymptotic spreading theory and the comparison principle, the non-existence of invasion traveling waves with speed $c

关键词: predator-prey system, ratio-dependent functional response, discrete diffusion, invasion traveling waves

Abstract: This article is concerned with the existence of traveling wave solutions for a discrete diffusive ratio-dependent predator-prey model. By applying Schauder's fixed point theorem with the help of suitable upper and lower solutions, we prove that there exists a positive constant $c^{*}$ such that when $c>c^{*}$, the discrete diffusive predator-prey system admits an invasion traveling wave. The existence of an invasion traveling wave with $c=c^{*}$ is also established by a limiting argument and a delicate analysis of the boundary conditions. Finally, by the asymptotic spreading theory and the comparison principle, the non-existence of invasion traveling waves with speed $c

Key words: predator-prey system, ratio-dependent functional response, discrete diffusion, invasion traveling waves

中图分类号: 

  • 34A33