Norm inflation with infinite loss of regularity at general initial data for nonlinear wave equations in Wiener amalgam and Fourier amalgam spaces

被引:1
|
作者
Bhimani, Divyang G. [1 ]
Haque, Saikatul [2 ]
机构
[1] Indian Inst Sci Educ & Res, Dept Math, Dr Homi Bhabha Rd, Pune 411008, India
[2] Harish Chandra Res Inst, Chhatnag Rd, Prayagraj 211019, India
关键词
Nonlinear wave equations; Norm inflation (strong ill-posedness); Wiener amalgam spaces; Fourier amalgam spaces; Fourier-Lebesgue spaces; Modulation spaces; WELL-POSEDNESS; ILL-POSEDNESS; MODULATION; NLS; MULTIPLIERS; EXISTENCE;
D O I
10.1016/j.na.2022.113076
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
We study the strong ill-posedness (norm inflation with infinite loss of regularity) for the nonlinear wave equation at every initial data in Wiener amalgam and Fourier amalgam spaces with negative regularity. In particular these spaces contain Fourier-Lebesgue, Sobolev and some modulation spaces. The equations are posed on R-d and on torus T-d and involve a smooth power nonlinearity. Our results are sharp with respect to well-posedness results of Benyi and Okoudjou (2009) and Cordero and Nicola (2009) in the Wiener amalgam and modulation space cases. In particular, we also complement norm inflation result of Christ, Colliander and Tao (2003) and Forlano and Okamoto (2020) by establishing infinite loss of regularity in the aforesaid spaces. (c) 2022 Elsevier Ltd. All rights reserved.
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页数:14
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