Uniqueness and existence of traveling waves for discrete quasilinear monostable dynamics

Uniqueness and existence of traveling waves for discrete quasilinear monostable dynamics
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DOI:
10.1007/s00208-003-0414-0
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发表时间:
2003-04
影响因子:
1.4
通讯作者:
Xinfu Chen;Jong-Shenq Guo
Xinfu Chen;Jong-Shenq Guo
中科院分区:
数学2区
文献类型:
--
作者:
Xinfu Chen;Jong-Shenq Guo

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研究了离散系统的行波问题 其中g是Lipschitz连续的,g是递增的,f是单稳态的,即,f(0)=f(1)=0且f>0在(0,1)上。我们证明了存在正的c_min使得存在速度为c的行波当且仅当c ≥ c_min。此外,我们还证明了行波在平移范围内是唯一的当且仅当f ′(0)>0>f′(1)和g ′(0)>0.对行波的尾部也进行了研究。
We study traveling waves of a discrete system wherefandgare Lipschitz continuous withgincreasing andfmonostable, i.e.,f(0)=f(1)=0 andf>0 on (0,1). We show that there is a positivecminsuch that a traveling wave of speedcexists if and only ifc≥cmin. Also, we show that traveling waves are unique up to a translation iff′(0)>0>f′(1) andg′(0)>0. The tails of traveling waves are also investigated.