A problem with formal initial conditions for differential equations with constant pseudodifferential coefficients by Il'kiv, V. S., Ільків, В. С.

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Solvability of the Nonlocal Boundary-Value Problem for a System of Differential-Operator Equations in the Sobolev Scale of Spaces and in a Refined Scale by Il'kiv, V. S., Strap, N. I., Ільків, В. С., Страп, Н. І.

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Problems for partial differential equations with nonlocal conditions. Metric approach to the problem of small denominators by Il'kiv, V. S., Ptashnik, B. I., Ільків, В. С., Пташник, Б. Й.

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Representation and investigation of solutions of a nonlocal boundary-value problem for a system of partial differential equations by Il'kiv, V. S., Ptashnik, B. I., Ільків, В. С., Пташник, Б. Й.

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Nonlocal boundary-value problem for a second-order partial differential equation in an unbounded strip by Il'kiv, V. S., Volyanska, I. I., Symotyuk, M. M., Ільків, В. С., Волянська, І. І., Симотюк, М. М.

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