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On the spectrum of a multipoint boundary value problem for a fourth-order equation. (English. Russian original) Zbl 06624636
Full Text: DOI
Spectral analysis of a fourth order differential operator with periodic and antiperiodic boundary conditions. (English. Russian original) Zbl 06620042
St. Petersbg. Math. J. 27, No. 5, 789-811 (2016); translation from Algebra Anal. 27, No. 5, 117-152 (2015).
Reviewer: Jonathan Eckhardt (Cardiff)