Abstract
In this paper, we construct the spectral expansion for the nonself-adjoint differential operators generated in the space of vector functions by an ordinary differential expression of arbitrary order with periodic matrix coefficients, by using the essential spectral singularities, singular quasimomenta, and series with parenthesis.
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Veliev, O.A. Spectral Expansion for Nonself-Adjoint Differential Operators with Periodic Matrix Coefficients. Math Notes 112, 1025–1043 (2022). https://doi.org/10.1134/S0001434622110359
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DOI: https://doi.org/10.1134/S0001434622110359