An initial boundary value problem for a partial differential equation of higher even order with a Bessel operator
- Authors: Urinov A.K.1,2, Azizov M.S.1
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Affiliations:
- Fergana State University
- Institute of Mathematics named after V. I. Romanovsky of the Academy of Sciences of the Republic of Uzbekistan
- Issue: Vol 26, No 2 (2022)
- Pages: 273-292
- Section: Differential Equations and Mathematical Physics
- URL: https://bakhtiniada.ru/1991-8615/article/view/83876
- DOI: https://doi.org/10.14498/vsgtu1893
- ID: 83876
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Abstract
In present paper, an initial-boundary value problem is formulated in a rectangle for a higher even order partial differential equation with the Bessel operator. Applying the method of separation of variables to the considered problem a spectral problem is obtained for an ordinary differential equation of higher even order. The self-adjointness of the last problem is proved, which implies the existence of the system of its eigenfunctions, as well as the orthonormality and completeness of this system. The uniform convergence of some bilinear series and the order of the Fourier coefficients, depending on the found eigenfunctions, is investigated. The solution of the considered problem is found as the sum of the Fourier series with respect to the system of eigenfunctions of the spectral problem. The absolute and uniform convergence of this series, as well as the series obtained by its differentiating, have been proved. The uniqueness of the solution of the problem is proved by the method of spectral analysis. An estimate is obtained for the solution of the problem which implies the continuous dependence of the solution on the given functions.
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##article.viewOnOriginalSite##About the authors
Akhmadjon K. Urinov
Fergana State University; Institute of Mathematics named after V. I. Romanovskyof the Academy of Sciences of the Republic of Uzbekistan
Email: urinovak@mail.ru
ORCID iD: 0000-0002-9586-1799
Scopus Author ID: 19639412400
http://www.mathnet.ru/person30024
Dr. Phys. & Math. Sci.; Professor; Dept. of Mathematical Analysis and Differential Equations, Leading Researcher
Uzbekistan, 19, Murabbiylar st., Fergana, 150100; 46, Universitetskaya st., Tashkent, 100174Muzaffar S. Azizov
Fergana State University
Author for correspondence.
Email: muzaffar.azizov.1988@mail.ru
ORCID iD: 0000-0002-2091-9300
Dept. of Mathematical Analysis and Differential Equations
Uzbekistan, 19, Murabbiylar st., Fergana, 150100References
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