TY JOUR TI Mathematical Methods for Solving Physical Problems of Wave Propagation in Elastic Media KW mathematics KW physics KW elastic wave problems KW earthquakes KW seismic waves KW surface waves KW Rayleigh and Love waves KW sound waves KW supersonic speed KW Mach cone KW shock wave JO Physics in Higher Education AU Kalashnikov, N.P. AU Matronchik, A.Y. AU Semenova, T.A. PY 2025 IS 31 PB Moscow Physical Society