Volume 191, Issue 2

This issue is a translation of Problemy Matematicheskogo Analiza (Problems in Mathematical Analysis), No. 70, May 2013. Editorial Board of PMA: N. Uraltseva (Main Editor), N. Ivochkina, A. Laptev, B. Makarov, V. Maz’ya, V. Osmolovskii, B. Plamenevskii, G. Rozenblyum, D. Yafaev. Invited Editor: A. V. Fursikov. Translated into English and edited by Tamara Rozhkovskaya (rozhk@math.nsc.ru)