Abstract
We establish the property of completeness in the space \(L_2(D) \), where \(D \) is a domain in \(\mathbb {R}^n \), \(n\geq 3\), of the products of all possible regular solutions of the equation \(\Delta u-\kappa ^2 u=0 \), \(\kappa \in \mathbb {R}_{+}\cup i\mathbb {R}_{-} \), by the fundamental solutions of this equation with singularities on a straight line that does not meet \(\overline {D}\). This result is used when establishing the uniqueness of the solution of a coefficient inverse problem of wave tomography in a nonoverdetermined statement.
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This work was supported by the Russian Science Foundation, project no. 20-11-20085.
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Translated by V. Potapchouck
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Kokurin, M.Y. Completeness of the Asymmetric Products of Solutions of a Second-Order Elliptic Equation and the Uniqueness of the Solution of an Inverse Problem for the Wave Equation. Diff Equat 57, 241–250 (2021). https://doi.org/10.1134/S0012266121020129
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DOI: https://doi.org/10.1134/S0012266121020129