. . . . . . . . . . . . . . . . . . . "Alexander G. Ramm (born 1940 in St. Petersburg, Russia) is an American mathematician. His research focuses on differential and integral equations, operator theory, ill-posed and inverse problems, scattering theory, functional analysis, spectral theory, numerical analysis, theoretical electrical engineering, signal estimation, and tomography."@en . . "Alexander G. Ramm (born 1940 in St. Petersburg, Russia) is an American mathematician. His research focuses on differential and integral equations, operator theory, ill-posed and inverse problems, scattering theory, functional analysis, spectral theory, numerical analysis, theoretical electrical engineering, signal estimation, and tomography."@en . . . . . . . . . . . . . . . . . "47486673"^^ . . . . . "33746"^^ . "Alexander Ramm"@en . . . . . . . "1117511624"^^ . . . . . . .