Abstract
We study the essential spectrum of a class of nonelliptic matrix partial differential operators related to a linear magnetohydrodynamic model.
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Konstantinov, A.Y. On the Essential Spectrum of a Class of Matrix Differential Operators. Functional Analysis and Its Applications 36, 233–235 (2002). https://doi.org/10.1023/A:1020110407743
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DOI: https://doi.org/10.1023/A:1020110407743