Volume 235, Issue 6

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. 136, Proceedings of the Seminar on Algebra and Geometry of Samara University, 2017.