Volume 159, Issue 2

This issue is a translation of a special issue of Problemy Matematicheskogo Analiza (Problems in Mathematical Analysis), No. 41, May 2009 gathered by the Editorial Board: N. Ivochkina, A. Laptev, B. Makarov, V. Maz’ya, V. Osmolovskii, B. Plamenevskii, G. Rozenblyum, and D. Yafaev on the occasion of the 75th birthday of Professor N.N. Uraltseva. Translated into English and edited by Tamara Rozhkovskaya (rozhk@mathbooks.ru)