Purely Imaginary Resonant Frequencies For a Lossy Inhomogeneous Medium

Purely Imaginary Resonant Frequencies For a Lossy Inhomogeneous Medium
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有损非均匀介质的纯虚谐振频率

DOI:
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发表时间:
1998
影响因子:
1.9
通讯作者:
C. Labreuche
C. Labreuche
中科院分区:
数学4区
文献类型:
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作者:
C. Labreuche

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本文旨在给出有耗非均匀介质在纯虚轴上的共振频率数的计数函数的渐近估计。基本上,我们扩展了[J.Ralston,Comm.纯苹果。Math.,XXV(1972),pp.45--61],他研究了非吸收非均匀介质。最后,我们在原点附近给出了一个简单的无极点区域。
Here we aim to give an asymptotic estimate of the counting function of the number of resonant frequencies on the purely imaginary axis for a lossy inhomogeneous medium. Basically, we extend the work of [J. Ralston, Comm. Pure Appl. Math., XXV (1972), pp. 45--61], who studied nonabsorbing inhomogeneous medium. Finally, we give a simple pole free region around the origin.