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arXiv 1006.0122math.AP
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一类L2临界色散广义Benjamin-Ono方程的局部适定性和能量爆破

Local well-posedness and blow up in the energy space for a class of L2 critical dispersion generalized Benjamin-Ono equations

Carlos E. Kenig, Yvan Martel, Luc Robbiano

摘要:

我们考虑一族色散广义Benjamin-Ono方程(dgBO),它在临界修正方程(BO)和临界广义Korteweg-de Vries方程(gKdV)之间具有临界L2范数和插值性.首先,我们证明了这些方程在能量空间中的局部适定性,推广了Kenig,Ponce和Vega关于(gKdV)方程的结果。其次,我们解决的精神,工作的Martel和Merle的临界(gKdV)方程的爆破问题,通过研究的刚性性质的(dgBO)流在附近的孤子。我们证明了当模型接近临界(gKdV)时,接近孤子的负能量解在能量空间中的有限或无限时间内爆破。爆破证明需要特别的扩展(dgBO)的单调性结果的本地化版本的L2范数的伪微分算子工具。

英文摘要:

We consider a family of dispersion generalized Benjamin-Ono equations (dgBO) which are critical with respect to the L2 norm and interpolate between the critical modified (BO) equation and the critical generalized Korteweg-de Vries equation (gKdV). First, we prove local well-posedness in the energy space for these equations, extending results by Kenig, Ponce and Vega concerning the (gKdV) equations. Second, we address the blow up problem in the spirit of works of Martel and Merle on the critical (gKdV) equation, by studying rigidity properties of the (dgBO) flow in a neighborhood of solitons. We prove that when the model is close to critical (gKdV), solutions of negative energy close to solitons blow up in finite or infinite time in the energy space. The blow up proof requires in particular extensions to (dgBO) of monotonicity results for localized versions of L2 norms by pseudo-differential operator tools.

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