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Analysis of the system of Wentzell equations in the circle and on its boundary. (English) Zbl 07899481

Summary: In this paper the system of Wentzell equations, which is represented by two differential equations, namely, the Barenblatt-Zheltov-Kochina equation describing the heat conduction process at two temperatures inside a circle with the dynamic boundary condition of Wentzel, represented as a heat conduction equation with the Laplace-Beltrami operator, set on the boundary of the circle. Meanwhile, in the classical theory of boundary value problems, the boundary condition is understood as an equation on the boundary in which the order of derivatives on spatial variables is at least one less than the order of derivatives in the equation given in the domain. Therefore the study of Wentzell’s system of equations opens the door to a new direction in research, where the equations can have derivatives of any order on both spatial and temporal variables.

MSC:

35G15 Boundary value problems for linear higher-order PDEs
65N30 Finite element, Rayleigh-Ritz and Galerkin methods for boundary value problems involving PDEs

References:

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[32] Гончаров Никита Сергеевич, аспирант, кафедра уравнений математической фи-зики, Южно-Уральский государственный университет (г. Челябинск, Российская Федерация), Goncharov.NS.krm@yandex.ru Свиридюк Георгий Анатольевич, доктор физико-математических наук, профес-сор кафедры уравнений математической физики, Южно-Уральский государствен-ный университет (г. Челябинск, Российская Федерация), sviridiukga@susu.ru Пос��упила в редакцию 13 марта 2023.
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