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arXiv 1412.0146math.AP
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具有库仑势的齐次Landau方程径向解的估计

Estimates for radial solutions of the homogeneous Landau equation with Coulomb potential

Maria Gualdani, Nestor Guillen

摘要:

受整体解存在性问题的启发,我们得到了带库仑势的齐次Landau方程径向对称单调解的逐点上界。估计说,在有限时间$T$中的$L^\infty$ -范数爆破只有当解的$L^{3/2}$ -范数集中接近$T$的时间时才能发生。使用比较原理的朗道方程和相关的质量函数的界限。这种方法提供了长期存在的各向同性版本的朗道方程的库仑势,最近介绍了克里格和应变。

英文摘要:

Motivated by the question of existence of global solutions, we obtain pointwise upper bounds for radially symmetric and monotone solutions to the homogeneous Landau equation with Coulomb potential. The estimates say that blow up in the $L^\infty$-norm at a finite time $T$ can occur only if the $L^{3/2}$-norm of the solution concentrates for times close to $T$. The bounds are obtained using the comparison principle for the Landau equation and for the associated mass function. This method provides long-time existence results for the isotropic version of the Landau equation with Coulomb potential, recently introduced by Krieger and Strain.

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。

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