Editor-in-Chief
Yu. M. Berezansky Institute of Mathematics, National Academy of Sciences of Ukraine, Kiev, Ukraine (berezan@mathber.carrier.kiev.ua ).

Deputy Editor-in-Chief
A. N. Kochubei Institute of Mathematics, National Academy of Sciences of Ukraine, Kiev, Ukraine (kochubei@i.com.ua).

Editorial Board
V. M. Adamyan Odessa National University, Odessa, Ukraine (vadamyan@onu.edu.ua).
S. Albeverio IAM, Bonn Universitat, Bonn, Germany (albeverio@uni-bonn.de).
M. L. Gorbachuk Institute of Mathematics, Kiev, Ukraine (imath@horbach.kiev.ua).
T. Hida Meijo University, Nagoya, Japan (takeyuki@math.nagoya-u.ac.jp).
Yu. G. Kondratiev IAM, Bonn Universitat, Bonn, Germany; Institute of Mathematics, Kiev, Ukraine (yukondrat@yandex.ru).
V. D. Koshmanenko Institute of Mathematics, Kiev, Ukraine (koshman63@googlemail.com).
M. M. MalamudDonets'k University, Donets'k, Ukraine (mmm@telenet.dn.ua).
Ya. V. Mykytyuk L'viv Ivan Franko National University, L'viv, Ukraine (yamykytyuk@yahoo.com).
L. P. Nizhnik Institute of Mathematics, Kiev, Ukraine (nizhnik@imath.kiev.ua).
M. Rockner University of Bielefeld, Bielefeld, Germany (roeckner@mathematik.uni-bielefeld.de).
F. S. Rofe-Beketov B. Verkin Institute for Low Temperatures, Kharkiv, Ukraine (rofebeketov@ilt.kharkov.ua).
Yu. S. Samoilenko Institute of Mathematics, Kiev, Ukraine (yurii_sam@imath.kiev.ua).
V. V. Sharko Institute of Mathematics, Kiev, Ukraine (sharko@imath.kiev.ua).
L. Streit BiBoS Research Center, Bielefeld, Germany (streit@physik.uni-bielefeld.de).

Advisory Board
L. Accardi University of Roma "Tor Vergata", Roma, Italy.
C. Boldrighini University of Roma "La Sapienza", Roma, Italy.
K. D. Elworthy University of Warwick, Coventry, Great Britain.
F. Gesztesy University of Missouri, Colombia, USA.
L. Gross Cornell University, Ithaca, USA.
H. Heyer University of Tubingen, Tubingen, Germany.
H. Langer Technical University, Vienna, Austria.
E. Lytvynov Swansea University, Swansea, U. K.
V. A. Marchenko Institute of Low Temperature Physics, Kharkov, Ukraine.
R. Mennicken University of Regensburg, Regensburg, Germany.
R. A. Minlos Institute for Problems of Information Transmission, Moscow, Russia.
A. S. Mishchenko M. V. Lomonosov State University, Moscow, Russia.
P. C. Sabatier Physique Mathe-matique, USTL, Montpellier, France.
K. Schmudgen University of Leipzig, Leipzig, Germany.
B. Simon California Institute of Technology, Pasadena, USA.
D. Stroock Massachusetts Institute of Technology, Cambridge, USA.
E. Tsekanovskii Niagara University, NY, USA.

Secretariate Institute of Mathematics, National Academy of Sciences of Ukraine, 3 Tereshchenkivs'ka Str., Kiev 01601, Ukraine (mfat@imath.kiev.ua ).
Yu. A. Chapovsky
S. I. Maksymenko
R. V. Romamenko