数学物理学报(英文版) ›› 2012, Vol. 32 ›› Issue (2): 710-716.doi: 10.1016/S0252-9602(12)60050-2

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ILL-POSEDNESS OF MODIFIED KAWAHARA EQUATION AND KAUP-KUPERSHMIDT EQUATION

闫威|李用声   

  1. Department of Mathematics, South China University of Technology, Guangzhou 510640, China
  • 收稿日期:2010-03-20 出版日期:2012-03-20 发布日期:2012-03-20
  • 基金资助:

    This work is supported by NNSFC under grant numbers 10771074 and 11171116; Yan is also supported in part by NNSFC under grant number 10801055 and the Doctoral Program of NEM of China under grant number 200805611026; Li is also supported in part by the Fundamental Research Funds for the Central Universities under the grant number 2012ZZ0072.

ILL-POSEDNESS OF MODIFIED KAWAHARA EQUATION AND KAUP-KUPERSHMIDT EQUATION

 YAN Wei, LI Yong-Sheng   

  1. Department of Mathematics, South China University of Technology, Guangzhou 510640, China
  • Received:2010-03-20 Online:2012-03-20 Published:2012-03-20
  • Supported by:

    This work is supported by NNSFC under grant numbers 10771074 and 11171116; Yan is also supported in part by NNSFC under grant number 10801055 and the Doctoral Program of NEM of China under grant number 200805611026; Li is also supported in part by the Fundamental Research Funds for the Central Universities under the grant number 2012ZZ0072.

摘要:

In this article, we consider the Cauchy problems for the modified Kawahara
equation
tu +μx(u3) + α5xuβ3xuγxu = 0
and the Kaup-Kupershmidt equation
tu + μu2xu + α5xuβ3xuγxu = 0.
Using the general well-posedness principle introduced by I. Bejenaru and T. Tao, we prove that the modified Kawahara equation is ill-posed for the initial data in Hs(R) with s < −1/4 and that the Kaup-Kupershmidt equation is ill-posed for the initial data in Hs(R) with
s < 0.

关键词: Ill-posedness, modified Kawahara equation, Kaup-Kupershmidt equation, general well-posedness principle

Abstract:

In this article, we consider the Cauchy problems for the modified Kawahara
equation
tu +μx(u3) + α5xuβ3xuγxu = 0
and the Kaup-Kupershmidt equation
tu + μu2xu + α5xuβ3xuγxu = 0.
Using the general well-posedness principle introduced by I. Bejenaru and T. Tao, we prove that the modified Kawahara equation is ill-posed for the initial data in Hs(R) with s < −1/4 and that the Kaup-Kupershmidt equation is ill-posed for the initial data in Hs(R) with
s < 0.

Key words: Ill-posedness, modified Kawahara equation, Kaup-Kupershmidt equation, general well-posedness principle

中图分类号: 

  • 35E15