Blow-up theorem for semilinear wave equations with non-zero initial position

JOURNAL OF DIFFERENTIAL EQUATIONS

卷:249

Article

Takamura, Hiroyuki¹  Uesaka, Hiroshi²  Wakasa, Kyouhei¹ 

[1] Future Univ Hakodate, Dept Complex Syst, Hakodate, Hokkaido 0418655, Japan

[2] Nihon Univ, Coll Sci & Technol, Dept Math, Tokyo 1018308, Japan

关键词: Blow-up;    Semilinear wave equations;   

DOI  :  10.1016/j.jde.2010.01.010

来源: Elsevier

【 摘 要 】

One of the features of solutions of semilinear wave equations can be found in blow-up results for non-compactly supported data. In spite of finite propagation speed of the linear wave, we have no global in time solution for any power nonlinearity if the spatial decay of the initial data is weak. This was first observed by Asakura (1986) [2] finding out a critical decay to ensure the global existence of the solution. But the blow-up result is available only for zero initial position having positive speed. In this paper the blow-up theorem for non-zero initial position by Uesaka (2009) 1221 is extended to higher-dimensional case. And the assumption on the nonlinear term is relaxed to include an example. Moreover the critical decay of the initial position is clarified by example. (C) 2010 Elsevier Inc. All rights reserved.

【 授权许可】

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