Viktor D. Mazurov (Sobolev Institute of Mathematics, SB RAS, Russia)
Jie Wu (Yanqi Lake Beijing Institute of Mathematical Sciences and Applications, Beijing, China)
Ualbai U. Umirbaev (Wayne State University, Detroit, USA)
Vladimir Shpilrain (The City University of New York, USA)
Darya V. Lytkina (SibSUTIS, Novosibirsk, Russia)