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Keywords = counterpart Holmgren’s boundary value problem

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14 pages, 310 KB  
Article
A Solution of a Boundary Value Problem with Mixed Conditions for a Four-Dimensional Degenerate Elliptic Equation
by Zharasbek Baishemirov, Abdumauvlen Berdyshev and Ainur Ryskan
Mathematics 2022, 10(7), 1094; https://doi.org/10.3390/math10071094 - 28 Mar 2022
Cited by 6 | Viewed by 2109
Abstract
The solvability issues of counterpart Holmgren’s boundary value problem with mixed conditions for a degenerate four-dimensional second-order Gellerstedt equation [...] Read more.
The solvability issues of counterpart Holmgren’s boundary value problem with mixed conditions for a degenerate four-dimensional second-order Gellerstedt equation Huymzktluxx+xnzktluyy+xnymtluzz+xnymzkutt=0, m,n,k,lconst>0, are studied in the finite domain R4+, where the values of normal derivatives are set on the piecewise smooth part of the boundary and the values of the desired function are set on the remaining part of the boundary. The main results of the work are the proof of the uniqueness of the considered problem solution by using an energy integral’s method and the construction of the solution of counterpart Holmgren’s boundary value problem in explicit form by means of Green’s function method, containing the hypergeometric Lauricella’s function FA4. Using the corresponding fundamental solution for the considered generalized Gellerstedt equation of elliptic type, we construct Green’s function. In addition, formulas of differentiation, some adjacent relations, decomposition formulas, and various properties of Lauricella’s hypergeometric functions were used to establish the main results for the aforementioned problem. Full article
(This article belongs to the Section C1: Difference and Differential Equations)
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