Topology, geometry, and dynamics : V.A. Rokhlin-memorial : Conference on Topology, Geometry, and Dynamics: V.A. Rokhlin-100, August 19-23, 2019, The Euler International Mathematical Institute, St. Petersburg, Russia, Steklov Institute of Mathematics, St. Petersburg, Russia / Anatoly M. Vershik, Victor M. Buchstaber, Andrey V. Malyutin, editors