arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1006.2172math.APmath-phmath.MP
收藏

等变波映射的稳定自相似爆破:线性化问题

On stable self-similar blow up for equivariant wave maps: The linearized problem

Roland Donninger, Birgit Schoerkhuber, Peter C. Aichelburg

摘要:

本文考虑从(3 + 1)Minkowski空间到三球面的共旋波映射。这是一个能量超临界模型,已知它通过自相似解表现出有限时间爆破。基态自相似解$f_0$是已知的封闭形式和基于数值的,它应该描述系统的一般爆破行为。本文围绕$f_0$建立了严格的线性微扰理论。这是研究自相似爆破非线性稳定性的必要前提。特别地,我们证明了$f_0$是线性稳定的,如果它是模式稳定的。此外,关于模式的稳定性问题,我们证明了新的结果,排除存在不稳定的特征值与大的虚部,也与实部大于1/2。其余的紧凑区域进行了充分的研究数值和所有可用的结果强烈建议不存在的不稳定模式。

英文摘要:

We consider co-rotational wave maps from (3+1) Minkowski space into the three-sphere. This is an energy supercritical model which is known to exhibit finite time blow up via self-similar solutions. The ground state self-similar solution $f_0$ is known in closed form and based on numerics, it is supposed to describe the generic blow up behavior of the system. In this paper we develop a rigorous linear perturbation theory around $f_0$. This is an indispensable prerequisite for the study of nonlinear stability of the self-similar blow up which is conducted in a companion paper. In particular, we prove that $f_0$ is linearly stable if it is mode stable. Furthermore, concerning the mode stability problem, we prove new results that exclude the existence of unstable eigenvalues with large imaginary parts and also, with real parts larger than 1/2. The remaining compact region is well-studied numerically and all available results strongly suggest the nonexistence of unstable modes.

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。

↑