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arXiv 2008.05176math.SPmath-phmath.APmath.MP
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从Lieb-Thirring不等式到阻尼wave equation的谱包络

From Lieb-Thirring inequalities to spectral enclosures for the damped wave equation

David Krejcirik, Tereza Kurimaiova

摘要:

利用阻尼波动方程的谱与非自伴Schroedinger算子的谱之间的对应关系,我们导出了阻尼波动方程的复特征值的各种界。特别地,我们建立了一个尖锐的结果,即一维阻尼波算子类似于无阻尼波算子,只要(可能是复值)阻尼的L^1范数小于2。因此,这些小阻尼是光谱检测不到的。

英文摘要:

Using a correspondence between the spectrum of the damped wave equation and non-self-adjoint Schroedinger operators, we derive various bounds on complex eigenvalues of the former. In particular, we establish a sharp result that the one-dimensional damped wave operator is similar to the undamped one provided that the L^1 norm of the (possibly complex-valued) damping is less than 2. It follows that these small dampings are spectrally undetectable.

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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