On the problem without initial conditions for a nonlinear degenerating parabolic system by Pukach, P. Ya., Пукач, П. Я., Пукач, П. Я.

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On the symplectic structure deformations related to the Monge–Ampère equation on the Kähler manifold $P_{2}(\mathbb{C})$ by Balinsky, A. A., Prykarpatski, A. K., Pukach, P. Ya., Vovk, M. I., Balinsky, A. A., Prykarpatski, A. K., Pukach, P. Ya., Vovk, M. I.

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Mixed problem for a nonlinear hyperbolic equation in a domain unbounded with respect to space variables by Lavrenyuk, S. P., Pukach, P. Ya., Лавренюк, С. П., Пукач, П. Я.

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