Volume 252, Issue 5

This issue is a translation of Zapiski Nauchnykh Seminarov Sankt-Peterburgskogo Otdeleniya Matematicheskogo Instituta im. V. A. Steklova Rossiiskoi Akademii Nauk (Notes of Scientific Seminars of the St. Petersburg Department of the Steklov Mathematical Institute, Russian Academy of Sciences), Vol. 483, 2019. This issue is entitled Mathematical Problems in the Theory of Wave Propagation, Part 49, and was edited by V. M. Babich and V. S. Mikhaylo