Abstract
Conditions, less stringent than those known at present, are found for the stabilization of a solution of a linear differential equation of the form (du/dt) + A(t) u =f(t) in Hilbert space to a solution of the operational equation Ax =f, where A is a positive self-adjoint operator. Some regularization algorithms (in A. N. Tikhonov's sense) for this equation are investigated.
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Ya. I. Al'ber, “Continuous regularization of linear operator equations,” Matem. Zametki,4, No. 5, 503–509 (1968).
M. I. Vishik and L. A. Lyusternik, “Stabilization of solutions of certain differential equations in Hilbert space,” Dokl. Akad. Nauk SSSR,111, No. 1, 12–15 (1956).
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A. B. Bakushinskii, “Regularization algorithms for linear equations with unbounded operators,” Dokl. Akad. Nauk SSSR,183, No. 1, 12–14 (1968).
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Translated from Matematicheskie Zametki, Vol. 9, No. 4, pp. 415–420, April, 1971.
I wish to thank Ya. I. Al'ber, O. A. Liskovts, and A. M. Il'in for their advice and useful comments.
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Bakushinskii, A.B. Stabilization of solutions of linear differential equations in Hilbert space. Mathematical Notes of the Academy of Sciences of the USSR 9, 239–242 (1971). https://doi.org/10.1007/BF01387772
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DOI: https://doi.org/10.1007/BF01387772