ON THE SPECTRAL THEORY OF A FOURTH-ORDER DIFFERENTIAL PENCIL ON THE WHOLE REAL AXIS

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Authors: N. F. GAFAROVA, A. Kh. KHANMAMEDOV

Keywords: pencil of fourth-order differential equations, multiple characteristics, operator pencil, spectrum, eigenvalues

DOI:  https://doi.org/10.32010/j.bmj.2024.06