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ZERO-ELECTRON-MASS LIMIT OF EULER-POISSON EQUATIONS

机译:欧拉-泊松方程的零电子质量极限

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We study the limit of vanishing ratio of the electron mass to the ion mass (zero-electron-mass limit) in the scaled Euler-Poisson equations. As the first step of this justification, we construct the uniform global classical solutions in critical Besov spaces with the aid of "Shizuta-Kawashima" skew-symmetry. Then we establish frequency-localization estimates of Strichartz-type for the equation of acoustics according to the semigroup formulation. Finally, it is shown that the uniform classical solutions converge towards that of the incompressible Euler equations (for ill-prepared initial data) in a refined way as the scaled electron-mass tends to zero. In comparison with the classical zero-mach-number limit in [7, 23], we obtain different dispersive estimates due to the coupled electric field.
机译:我们在比例Euler-Poisson方程中研究了电子质量与离子质量的消失比极限(零电子质量极限)。作为这一论证的第一步,我们借助“静田-川岛”歪斜对称性在临界Besov空间中构造了统一的全局经典解。然后,根据半群公式,为声学方程式建立了Strichartz型频率定位估计。最后,证明了当标定电子质量趋于零时,统一经典解以一种改进的方式收敛到不可压缩的Euler方程(对于不良准备的初始数据)。与[7,23]中的经典零马赫数极限相比,由于耦合电场,我们获得了不同的色散估计。

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