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supported by NNSFC under grant numbers 10771074 and 11171116;supported in part by NNSFC under grant number 10801055;the Doctoral Program of NEM of China under grant number 200805611026;supported in part by the Fundamental Research Funds for the Central Universities under the grant number 2012ZZ0072
In this article, we consider the Cauchy problems for the modified Kawahara equationδtu+μδx(u3)+αδx5u+βδx3u+γδxu=0 and the Kaup-Kupershmidt equation δtu+μuδx2u+αδx5u+βδx3u+βδx3u+γδxu=0Usi...
supported by the Science Foundation of Jiangsu University (07JDG038)
The nonlinear D-S equations on R^d, with general power nonlinearity and with both the focusing and defocusing signs, are proved to be ill-posed in the Sobolev space H^s whenever the exponent s is lower than that predi...