The conditions of well-posedness of nonlocal boundary-value problems are established for a second-order linear partial differential equation in an unbounded strip in the case where the real parts of the roots of its characteristic equation are different and nonzero.
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Translated from Ukrains’kyi Matematychnyi Zhurnal, Vol. 70, No. 10, pp. 1374–1381, October, 2018.
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Volyanska, I.I., Ilkiv, V.S. & Symotyuk, M.M. Nonlocal Boundary-Value Problem for a Second-Order Partial Differential Equation in an Unbounded Strip. Ukr Math J 70, 1585–1593 (2019). https://doi.org/10.1007/s11253-019-01591-1
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DOI: https://doi.org/10.1007/s11253-019-01591-1