In this paper, we consider an inverse problem with a time-dependent coefficient. This problem is ill-posed. To regularize this problem, we use the integral truncation method combined with the quasi-boundary value method. We construct approximate solutions and consider the stability of such a solution. Moreover, we evaluate the errors between regularized solutions and exact solutions. A numerical method is given to illustrate the theoretically obtained results.
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Huy et al. (2024) studied this question.
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