O. Bezushchak, Taras Shevchenko National University, 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, Shenzen International Center for Mathematics, Shenzhen, China R. Grigorchuk, Texas A&M University, College Station, TX E. Zelmanov, Southern University of Science and Technology, Shenzen International Center for Mathematics, Shenzhen, China