Levenshtam, V. B. Hyperbolic equation with rapidly oscillating data: reconstruction of the small lowest order coefficient and the right-hand side from partial asymptotics of the solution. (English. Russian original) Zbl 1491.35464 Dokl. Math. 105, No. 1, 28-30 (2022); translation from Dokl. Ross. Akad. Nauk, Mat. Inform. Protsessy Upr. 502, 34-36 (2022). MSC: 35R30 35C20 35L15 PDF BibTeX XML Cite \textit{V. B. Levenshtam}, Dokl. Math. 105, No. 1, 28--30 (2022; Zbl 1491.35464); translation from Dokl. Ross. Akad. Nauk, Mat. Inform. Protsessy Upr. 502, 34--36 (2022) Full Text: DOI OpenURL
Levenshtam, V. B. Asymptotic problems of reconstructing a high-frequency source of a wave equation. (English. Russian original) Zbl 1487.35449 Math. Notes 111, No. 4, 636-642 (2022); translation from Mat. Zametki 111, No. 4, 624-630 (2022). MSC: 35R30 35L05 35L15 PDF BibTeX XML Cite \textit{V. B. Levenshtam}, Math. Notes 111, No. 4, 636--642 (2022; Zbl 1487.35449); translation from Mat. Zametki 111, No. 4, 624--630 (2022) Full Text: DOI OpenURL