arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1709.04713math.AP
收藏

具有弱正则非线性项的色散方程的经典适定性及Besov空间中的一个合成定理

Classical well-posedness in dispersive equations with nonlinearities of mild regularity, and a composition theorem in Besov spaces

Mats Ehrnström, Long Pei

摘要:

对于局部化和周期性初始数据,我们证明了一类具有轻度规则性非线性的色散方程$u_{t}+(n(u))_{x}+Lu_{x}=0$在经典能量空间$H^s, s>\frac{3}{2}$中的局部存在性。我们的结果对符号为温和增长的对称Fourier乘子算子$L$和局部索伯列夫空间$H^{s+2}_{\mathrm{loc}}(\mathbb{R})$中的$n(\cdot)$都是有效的.特别是,结果包括非光滑和指数增长的非线性。我们的证明是基于一个组合的半群的方法和一个新的组合结果Besov空间。特别地,我们利用Besov空间的差分导数特征,将$\mathbb{R}$上Besov空间上Nemytskii算子的一个已有结果推广到周期情形.

英文摘要:

For both localized and periodic initial data, we prove local existence in classical energy space $H^s, s>\frac{3}{2}$, for a class of dispersive equations $u_{t}+(n(u))_{x}+Lu_{x}=0$ with nonlinearities of mild regularity. Our results are valid for symmetric Fourier multiplier operators $L$ whose symbol is of temperate growth, and $n(\cdot)$ in local Sobolev space $H^{s+2}_{\mathrm{loc}}(\mathbb{R})$. In particular, the results include non-smooth and exponentially growing nonlinearities. Our proof is based on a combination of semi-group methods and a new composition result for Besov spaces. In particular, we extend a previous result for Nemytskii operators on Besov spaces on $\mathbb{R}$ to the periodic setting by using the difference-derivative characterization of Besov spaces.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑