On the spectrum of the differential operators of even order with periodic matrix coefficients
نویسندگان
چکیده
In this paper, we consider the band functions, Bloch functions and spectrum of self-adjoint differential operator L with periodic matrix coefficients. Conditions are found for coefficients under which number gaps in is finite.
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ژورنال
عنوان ژورنال: Letters in Mathematical Physics
سال: 2023
ISSN: ['0377-9017', '1573-0530']
DOI: https://doi.org/10.1007/s11005-023-01679-7