Please prepare abstracts as a tex-file in accordance with example set out below and send to e-mail:
plaksa62@gmail.com
zel@imath.kiev.ua
olelim2010@yahoo.com
Abstracts that do not meet the requirements, will not be accepted for publication.
Last term of serve of abstracts - May 1st, 2013.

TEX-FILE PREAMBLE:

documentclass{amsart}
\usepackage{amsfonts,amssymb}
\begin{document}
\centerline{\bf Author(s) (City, Country)}
\vskip 0.2cm
\begin{center}
{\bf TITLE OF ABSTRACT}
\end{center}
Text of abstract.
(Please, design the theorems according to the examples given below.)
\vskip 0.3cm
{\bf Theorem~1.} {\it Text of Theorem 1}
\end{document}