Wave packet pseudomodes of twisted Toeplitz matrices
نویسندگان
چکیده
منابع مشابه
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, related to Hörmander’s commutator condition for partial differential equations, ε-pseudoeigenvectors of...
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ژورنال
عنوان ژورنال: Communications on Pure and Applied Mathematics
سال: 2004
ISSN: 0010-3640,1097-0312
DOI: 10.1002/cpa.20034