Purely Imaginary Resonant Frequencies For a Lossy Inhomogeneous Medium
Purely Imaginary Resonant Frequencies For a Lossy Inhomogeneous Medium
复制标题
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
中科院分区:
文献类型:
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作者:
C. Labreuche
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.