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\newcommand*\Q[2]{\frac{\partial #1}{\partial #2}}
\section<presentation>*{Overview}
\begin{frame}{Overview} \tableofcontents[part=1,pausesections] \end{frame}
\AtBeginSubsection[]{\begin{frame}<beamer>
\frametitle{Overview} \tableofcontents[current,currentsubsection] \end{frame} }
\part<presentation>{Main part}
\section{Research and studies}
\begin{frame}{The integral and its geometric applications.}
The first Green equation:
\begin{align}\label{green}
\underset{\mathcal{G}\quad}\iiint\!
\left[u\nabla^{2}v+\left(\nabla u,\nabla v\right)\right]d^{3}V
=\underset{\mathcal{S}\quad}\oiint u\Q{v}{n}d^{2}A
\end{align}
The Green equation (\ref{green}) will be checked later.
\begin{itemize}
\item A line with \texttt{itemize}.
\begin{itemize}
\item A line with \texttt{itemize}.
\begin{enumerate}
\item A line with \texttt{enumerate}.
\item Another one \ldots
\end{enumerate}
\item A line with \texttt{itemize}.
\end{itemize}
\item A line with \texttt{itemize}.
\end{itemize}
\end{frame}
\subsection{Interval}
\begin{frame}{Definition}
The \emph{interval} $\langle a,b\rangle$ contains all numbers $x$ that satisfy
the condition $a\le x \le b$.
\end{frame}
\subsection{Sequence of numbers}
\begin{frame}{Definition of a sequence}
A \emph{sequence of numbers} or \emph{sequence} is created by replacing each
member of the infinite sequence of numbers $1,2,3,\ldots$ by some rational or
irrational number, i.\,e.\ each $n$ by a number $x_n$.
\end{frame}
\subsection{Limits}
\begin{frame}{Definition of a limit}
$\lim x_n=g$ means that almost all members of the series are within each
neighbourhood of $g$.
\end{frame}
\subsection{Convergence criterion}
\begin{frame}{Definition of convergence}
\textbf{Convergence criterion}: The sequence $x_1,x_2,x_3,\ldots$ converges
if and only if \textbf{each} sub-sequence $x^\prime_1,x^\prime_2,
x^\prime_3,\ldots$ satisfies the relation $\lim(x_n-x^\prime_n)=0$.
\end{frame}
\endinput
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