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The Bulletin of Irkutsk State University. Series Mathematics, 2016, Volume 15, Pages 62–77 (Mi iigum253)  

This article is cited in 1 scientific paper (total in 1 paper)

Lavrentiev regularization of integral equations of the first kind in the space of continuous functions

I. R. Muftahova, D. N. Sidorovbac, N. A. Sidorovc

a Irkutsk National Research Technical University, 80, Lermontov st., Irkutsk, 664033
b ESI SB RAS, 130, Lermontov st., Irkutsk, 664033
c Irkutsk State University, 1, K. Marx, Irkutsk, 664003

Abstract: The regularization method of linear integral Volterra equations of the first kind is considered. The method is based on the perturbation theory. In order to derive the estimates of approximate solutions and regularizing operator norms we use the Banach–Steinhaus theorem, the concept of stabilising operator, as well as abstract scheme for construction of regularizing equations proposed in the monograph N.A. Sidorov (1982, MR87a: 58036). The known results (existence of the second derivatives of kernel and source) of A.M. Denisova (1974, MR337040) for the Volterra equations' regularization were strengthened. The approximate method was tested on the examples of numerical solutions of integral equations under various noise levels in the source function and in the kernel. The regularization method is tested on Volterra integral equations with piecewise continuous kernels suggested by D.N. Sidorov (2013, MR3187864). The desired numerical solution is sought in the form of a piecewise constant and piecewise linear functions using quadrature formulas of Gauss and midpoint rectangles. The numerical experiments have demonstrated the efficiency of Lavrentiev regularization applied to Volterra integral equations of the first kind with discontinuous kernels.

Keywords: Linear Integral Equation, Regularizing Equation, Stabilizing Operator, Volterra Equation of the First Kind, Lavrentiev Regularization, Perturbation Method, Quadrature, Banach–Steinhaus theorem.

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UDC: 517.518.15
MSC: 45D05

Citation: I. R. Muftahov, D. N. Sidorov, N. A. Sidorov, “Lavrentiev regularization of integral equations of the first kind in the space of continuous functions”, The Bulletin of Irkutsk State University. Series Mathematics, 15 (2016), 62–77

Citation in format AMSBIB
\Bibitem{MufSidSid16}
\by I.~R.~Muftahov, D.~N.~Sidorov, N.~A.~Sidorov
\paper Lavrentiev regularization of integral equations of the first kind in the space of continuous functions
\jour The Bulletin of Irkutsk State University. Series Mathematics
\yr 2016
\vol 15
\pages 62--77
\mathnet{http://mi.mathnet.ru/iigum253}


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    This publication is cited in the following articles:
    1. A. I. Dreglya, N. A. Sidorov, “Identifikatsiya dinamiki vneshnei sily pri modelirovanii kolebanii”, Izvestiya Irkutskogo gosudarstvennogo universiteta. Seriya Matematika, 19 (2017), 105–112  mathnet  crossref
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