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Russia Tambov
Year
2018
Volume
28
Issue
3
Pages
284-292
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Section Mathematics
Title Comparison of solutions to boundary-value problems for linear functional-differential equations
Author(-s) Zhukovskiy E.S.a, Takhir Kh.M.a
Affiliations Tambov State Universitya
Abstract We consider the issues of solvability of boundary value problems for linear functional-differential equations. Statements allowing one to obtain conditions for the existence of a unique solution and for non-negativity of the Green's function, and to obtain a fundamental solution to the homogeneous equation are suggested. In order to apply these statements, one needs to define a “reference” boundary value problem that possesses the corresponding properties and to define an operator by means of the operators generated by the problem under study and the “reference” problem according to the given rule. If the spectral radius of this operator is less than 1, then the boundary value problem under consideration is uniquely solvable. Similarly, in order to obtain conditions for the nonnegativity of the Green's function and the fundamental solution, it is required to determine a special operator by the rule given in the paper and to verify its positivity. An example of application of the statements obtained to a particular boundary value problem with an integral boundary condition for the equation containing argument deviations to the unknown function and to its derivative is considered.
Keywords linear functional-differential equation, boundary value problem, Green's function, fundamental solution of a homogeneous equation, positive operator
UDC 517.977
MSC 34K10, 34K06
DOI 10.20537/vm180302
Received 27 April 2018
Language Russian
Citation Zhukovskiy E.S., Takhir Kh.M. Comparison of solutions to boundary-value problems for linear functional-differential equations, Vestnik Udmurtskogo Universiteta. Matematika. Mekhanika. Komp'yuternye Nauki, 2018, vol. 28, issue 3, pp. 284-292.
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