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JOURNALS // Doklady Rossijskoj Akademii Nauk. Mathematika, Informatika, Processy Upravlenia // Archive

Dokl. RAN. Math. Inf. Proc. Upr., 2025 Volume 524, Pages 25–33 (Mi danma654)

MATHEMATICS

Linear Fredholm integral equations of the first kind with constraints on the solution

Yu. A. Kriksin, V. F. Tishkin

Keldysh Institute of Applied Mathematics of Russian Academy of Sciences, Moscow, Russia

Abstract: A linear integral equation of the first kind is considered in with an approximately specified righthand side. The desired solution satisfies the specified convex constraints. An iteration sequence is constructed, the limit of which is an approximate solution satisfying the imposed constraints. The approximate solution converges strongly to the exact solution if the error in the right-hand side of the equation tends to zero (in the norms of the corresponding Hilbert spaces). The proposed iteration process is numerically tested in a model problem for a linear integral equation of the first kind, the solution of which satisfies the linear constraints.

Keywords: integral equation of the first kind, Hilbert space, A.N. Tikhonov’s regularization method, linear and convex constraints.

UDC: 519.642

Presented: A. L. Semenov
Received: 05.04.2025
Revised: 14.07.2025
Accepted: 14.07.2025

DOI: 10.7868/S3034504925040049



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© Steklov Math. Inst. of RAS, 2025