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- W2892079418 abstract "We construct a functional model (direct integral expansion) and study the spectra of certain periodic block-operator Jacobi matrices, in particular, of general 2D partial difference operators of the second order. We obtain the upper bound, optimal in a sense, for the Lebesgue measure of their spectra. The examples of the operators for which there are several gaps in the spectrum are given." @default.
- W2892079418 created "2018-09-27" @default.
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- W2892079418 date "2019-07-02" @default.
- W2892079418 modified "2023-10-16" @default.
- W2892079418 title "On Direct Integral Expansion for Periodic Block-Operator Jacobi Matrices and Applications" @default.
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- W2892079418 doi "https://doi.org/10.3842/sigma.2019.050" @default.
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