Abstract:
Within the framework of the theory of operator cosine functions and its application, a solution of the Dirichlet boundary value problem for the generalized Helmholtz equation in a strip is found and the correct solvability of this problem is established. The critical width of the strip is found depending on the boundary conditions. Applying this result to the problem of heat propagation in a dihedral angle allows us to determine the angle of correctness of this problem and specify the law of heat propagation in the considered region.
Keywords:
strongly continuous cosine functions and transformation semigroups, boundary value problems, correct solvability.
This research was supported by the Ministry of Science and Higher Education of the Russian Federation within the state assignment in science, subject no. FZGF-2020-0009.
Presented:V. P. Maslov Received: 27.04.2021 Revised: 04.06.2021 Accepted: 15.06.2021
Citation:
V. A. Kostin, D. V. Kostin, A. V. Kostin, “On the correct solvability of the Dirichlet boundary value problem for the generalized Helmholtz equation in a strip”, Dokl. RAN. Math. Inf. Proc. Upr., 499 (2021), 31–34; Dokl. Math., 104:1 (2021), 184–187
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Linking options:
https://www.mathnet.ru/eng/danma185
https://www.mathnet.ru/eng/danma/v499/p31
This publication is cited in the following 1 articles:
V. A. Kostin, D. V. Kostin, M. N. Silaeva, A. P. Zhurikhin, “On the solvability of the Cauchy problem for the wave equation of aerodynamics describing the supersonic flow of thin surfaces”, Lobachevskii J. Math., 44:8 (2023), 3398