Wave packet pseudomodes of twisted Toeplitz matrices
The pseudospectra of banded, nonsymmetric Toeplitz or circulant matrices with varying coefficients are considered. Such matrices are characterized by a symbol that depends on both position (x) and wave number (k). It is shown that when a certain winding number or twist condition is satisfied, relate...
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| 格式: | Journal article |
| 出版: |
2004
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