Edited by Mikhail M. Lavrent'ev (Editor-in-Chief), Sobolev Institute of Mathematics, Russian Academy of Sciences, Novosibirsk, Russia; Sergey I. Kabanikhin (Managing Editor), Sobolev Institute of Mathematics, Russian Academy of Sciences,Novosibirsk, Russia;Akbar H. Begmatov (Member of the Editorial Board), Novosibirsk State Technical University, Russia; Tukhtamurad D. Dzhuraev (Member of the Editorial Board), Institute of Mathematics and Information Technology, Uzbekistan Academy of Sciences, Tashkent, Uzbekistan; Saburou Saitoh (Member of the Editorial Board), Gunma University, Kiryu, Japan; Masahiro Yamamoto (Member of the Editorial Board), The University of Tokyo, Japan.