O. Bezushchak, Taras Shevchenko National University of Kyiv, Ukraine Yu. Drozd, Institute of Mathematics, National Academy of Sciences, Kyiv, Ukraine P. Etingof, Massachusetts Institute of Technology, Cambridge, MA V. Futorny, Southern University of Science and Technology, Shenzhen International Center for Mathematics, China R. Grigorchuk, Texas A&M University, College Station, TX E. Zelmanov, Southern University of Science and Technology, Shenzhen International Center for Mathematics, China