Startseite Nonlinear convolution integro-differential equation with variable coefficient
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Nonlinear convolution integro-differential equation with variable coefficient

  • Sultan N. Askhabov
Veröffentlicht/Copyright: 23. Juni 2021
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Abstract

For an integro-differential equation of the convolution type defined on the half-line [0, ∞) with a power nonlinearity and variable coefficient, we use the weight metrics method to prove a global theorem on the existence and uniqueness of a solution in the cone of nonnegative functions in the space C[0, ∞). It is shown that the solution can be found by a successive approximation method of the Picard type; an estimate for the rate of convergence of the approximations is produced. We present sharp two-sided a-priori estimates for the solutions. These estimates enable us to construct a complete metric space which is invariant under the nonlinear convolution operator considered here and to prove that the equation induced by this operator has a unique solution in this space as well as in the class of all non-negative continuous functions vanishing at the origin.

Such equations with operators of fractional calculus as the Riemann-Liouville, Erdélyi-Kober, Hadamard fractional integrals arise, in particular, when describing the process of propagation of shock waves in gas-filled pipes, solving the problem about heating a half-infinite body in a nonlinear heat-transfer process, considering models of population genetics, and elsewhere.

Acknowledgements

This work was supported by the Russian Foundation for Basic Research, Project No 18-41-200001. The article is published as part of the State Contract in accordance with the Agreement No 075-03-2021-071 from 29.12.2020 for the project titled “Nonlinear Singular Integro-Differential Equations and Boundary Value Problems”.

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Received: 2020-08-03
Revised: 2021-05-10
Published Online: 2021-06-23
Published in Print: 2021-06-25

© 2021 Diogenes Co., Sofia

Heruntergeladen am 16.11.2025 von https://www.degruyterbrill.com/document/doi/10.1515/fca-2021-0036/pdf?lang=de
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