Higher-order resonances and instability of high-frequency WKB solutions

被引:5
|
作者
Lu, Yong [1 ]
机构
[1] Charles Univ Prague, Fac Math & Phys, Math Inst, Sokolovska 83, Prague 18675, Czech Republic
关键词
Higher-order resonances; WKB solutions; Transparency conditions; Instabilities; KLEIN-GORDON EQUATIONS; GLOBAL EXISTENCE;
D O I
10.1016/j.jde.2015.10.001
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
This paper focuses on the destabilizing role of resonances in high-frequency WKB solutions. Specifically, we study higher-order resonances associated with higher-order harmonics generated by nonlinearities. We give examples of systems and solutions for which such resonances generate instantaneous instabilities, even though the equations linearized around the leading WKB terms are initially stable, meaning in particular that the key destabilizing terms are not present in the data. (C) 2015 Elsevier Inc. All rights reserved.
引用
收藏
页码:2296 / 2353
页数:58
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