We establish and study sufficient conditions of solvability of the Neumann problem for fourth-order properly elliptic equations of the general form in a unit disk K in the space \( {C}^4(K)\cap {C}^{3,\upalpha}\left(\overline{K}\right) \).
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Translated from Matematychni Metody ta Fizyko-Mekhanichni Polya, Vol. 57, No. 1, pp. 7–17, January–March, 2014.
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Buryachenko, K.O., Kharabara, A.I. Solvability of the Neumann Problem in a Disk for Fourth-Order Properly Elliptic Equations. J Math Sci 212, 1–15 (2016). https://doi.org/10.1007/s10958-015-2644-6
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DOI: https://doi.org/10.1007/s10958-015-2644-6