Volume 253, Issue 4

This issue is a translation of Itogi Nauki i Tekhniki. Sovremennaya Matematika i Ee Prilozheniya. Tematicheskie Obzory (Progress in Science and Technology. Contemporary Mathematics and Its Applications. Thematic Surveys), Vol. 154, Proceedings of the International Conference “Actual Problems of Applied Mathematics and Physics,” Kabardino-Balkaria, Nalchik, May 17–21, 2017, 2018.