Low regularity well-posedness for generalized Benjamin–Ono equations on the circle

Low regularity well-posedness for generalized Benjamin–Ono equations on the circle
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圆上广义本杰明-小野方程的低正则适定性

DOI:
10.1142/s0219891621500272
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发表时间:
2020
影响因子:
0.7
通讯作者:
R. Schippa
R. Schippa
中科院分区:
数学4区
文献类型:
--
作者:
Kihyun Kim;R. Schippa

文献摘要

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给出了具有四次以上非线性和周期边界条件的广义Benjamin-Ono方程的新的低正则性良定性结果。我们采用短时傅里叶变换限制方法和修正能量来克服导数损失。先前,Molinet-Ribaud通过规范变换在[公式:见文本]中建立了局部适定性。我们在[公式:见文],[公式:见文]中展示了局部存在性和先验估计,在[公式:见文],[公式:见文]中展示了局部适定性,而不使用规范变换。对于四次非线性,我们证明了在初始数据小的情况下解的整体存在性。
New low regularity well-posedness results for the generalized Benjamin–Ono equations with quartic or higher nonlinearity and periodic boundary conditions are shown. We use the short-time Fourier transform restriction method and modified energies to overcome the derivative loss. Previously, Molinet–Ribaud established local well-posedness in [Formula: see text] via gauge transforms. We show local existence and a priori estimates in [Formula: see text], [Formula: see text], and local well-posedness in [Formula: see text], [Formula: see text] without using gauge transforms. In case of quartic nonlinearity we prove global existence of solutions conditional upon small initial data.