Volume 246, Issue 6

This issue is a translation of Sibirskii Zhurnal Chistoii Prikladnoi Matematiki (Siberian Journal of Pure and Applied Mathematics) edited by Sergey S. Goncharov, Vol. 18, No. 1-2, 2018. Translated into English and edited by Tamara Rozhkovskaya (rozhk@math.nsc.ru).