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Found 3,637 Documents (Results 1–100)

On the multiple spectrum of a problem for the Bessel equation of an integer order with squared spectral parameter in the boundary condition. (English. Russian original) Zbl 1531.34033

Differ. Equ. 59, No. 10, 1440-1442 (2023); translation from Differ. Uravn. 59, No. 10, 1438-1440 (2023).
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On the bifurcation of thresholds of the essential spectrum with a spectral singularity. (English. Russian original) Zbl 1527.81055

Differ. Equ. 59, No. 2, 278-282 (2023); translation from Differ. Uravn. 59, No. 2, 270-274 (2023).
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On the spectral properties of high-order differential operators with periodic boundary conditions. (English. Russian original) Zbl 1523.34092

Differ. Equ. 59, No. 3, 312-331 (2023); translation from Differ. Uravn. 59, No. 3, 314-332 (2023).
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The spectral properties of a two-term fourth-order operator with a spectral parameter in the boundary condition. (English. Russian original) Zbl 1521.34020

Sib. Math. J. 64, No. 3, 649-669 (2023); translation from Sib. Mat. Zh. 64, No. 3, 611-634 (2023).
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