Pushed-to-Pulled Front Transitions: Continuation, Speed Scalings, and Hidden Monotonicty
Pushed-to-Pulled Front Transitions: Continuation, Speed Scalings, and Hidden Monotonicty
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推拉前端转换:延续、速度缩放和隐藏单调性
DOI:
10.1007/s00332-023-09957-3
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发表时间:
2023
影响因子:
3
通讯作者:
Scheel, Arnd
中科院分区:
文献类型:
--
作者:
Avery, Montie;Holzer, Matt;Scheel, Arnd
We analyze the transition between pulled and pushed fronts both analytically and numerically from a model-independent perspective. Based on minimal conceptual assumptions, we show that pushed fronts bifurcate from a branch of pulled fronts with an effective speed correction that scales quadratically in the bifurcation parameter. Strikingly, we find that in this general context without assumptions on comparison principles, the pulled front loses stability and gives way to a pushed front when monotonicity in the leading edge is lost. Our methods rely on far-field core decompositions that identify explicitly asymptotics in the leading edge of the front. We show how the theoretical construction can be directly implemented to yield effective algorithms that determine spreading speeds and bifurcation points with exponentially small error in the domain size. Example applications considered here include an extended Fisher-KPP equation, a Fisher–Burgers equation, negative taxis in combination with logistic population growth, an autocatalytic reaction, and a Lotka-Volterra model.
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影响因子:
2.6
作者:
Jing An;Christopher Henderson;L. Ryzhik
通讯作者:
L. Ryzhik
DOI:
10.1016/j.matpur.2022.09.004
发表时间:
2021-02
期刊:
Journal de Mathématiques Pures et Appliquées
影响因子:
--
作者:
Christopher Henderson
通讯作者:
Christopher Henderson
DOI:
10.1090/cams/8
发表时间:
2022
期刊:
Communications of the American Mathematical Society
影响因子:
--
作者:
Avery, Montie;Scheel, Arnd
通讯作者:
Scheel, Arnd
影响因子:
1.1
作者:
Faye, Gregory;Holzer, Matt;Scheel, Arnd;Siemer, Lars
通讯作者:
Siemer, Lars
DOI:
10.1137/s003614299833734x
发表时间:
2000
期刊:
SIAM J. Numer. Anal.
影响因子:
--
作者:
G. Lord;Daniela Peterhof;Bjorn Sandstede;A. Scheel
通讯作者:
A. Scheel