Frequencies of oscillating systemsMatricesMechanics of particles and systems -- Dynamics of a system of particles, including celestial mechanics -- Inverse problemsNumerical analysis -- Integral equations, integral transforms -- Inverse problemsNumerical analysis -- Partial differential equations, boundary value problems -- Inverse problemsOscillationsPartial differential equations -- Equations of mathematical physics and other areas of application -- PDEs in connection with mechanics of particles and systemsPartial differential equations -- Spectral theory and eigenvalue problems -- Scattering theory
