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\begin{document}
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\addcontentsline{toc}{section}{V.Babenko and N.Parfinovych The Best Approximation of Periodic Functions by Splines}
%************************ TITLE *****************************:
\begin{center}
{\Large\bf The Best Approximation of Periodic Functions by Splines
}
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%*********************** AUTHORS ****************************
\centerline{\large Vladislav~Babenko and Nataliya~Parfinovych}

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%*********************** ABSTRACT ***************************
% Insert your abstract. The whole document must fit inside one page, preferably half a page.
% Please, design the theorems according to the example below.



\vskip 0.2cm \noindent {\bf Theorem}.  Let  $r,n,m\in N$, $k=1,2$,
$h\in (0,\frac{2\pi}{n})$
 

 \vskip 0.2cm



%********************** REFERENCES **************************
% Please, design the References according to the examples below.

%\vskip 0.3cm \noindent {\large\bf References} \vskip 0.2cm

%\begin{enumerate}
%\item {
%V.~K.~Dzyadyk, V.~K.~Dzyadyk, {\it Title of paper,} Title of
%jour., {\bf 15} (1964), 596--602. (Russian)}

%\item {
%V.~K.~Dzyadyk, Title of monograph. - City: Publishing House,
%Year.}
%\end{enumerate}

%*********************** ADDRESS ****************************
% For each of the authors, please

\medskip
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\noindent
\begin{minipage}[t]{9.5cm}
\small{ Dnepropetrovsk National\\ University \\ e-mail: \
babenko.vladislav@\@gmail.com }
\end{minipage}
% For the second author
% And so on if needed
\begin{minipage}[t]{9.5cm}
\small{ Dnepropetrovsk National\\ University \\  e-mail: \
nparfinovich@\@mail.ru }
\end{minipage}
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