34 \begin{frame}[t]

    34 %\begin{frame}[t]

    35 \begin{mybox}

    35 %\begin{mybox}

    36 A physical explanation the \emph{dynamic matrix}\\

    36 %A physical explanation the \emph{dynamic matrix}\\

    37 lots of text

    37 %lots of text

    38 \end{mybox}

    38 %\end{mybox}

    39 

    39 

    40 

    40 

    41 \begin{mybox2}{Test}

    41 %\begin{mybox2}{Test}

    42 A physical explanation the \emph{dynamic matrix}\\

    42 %A physical explanation the \emph{dynamic matrix}\\

    43 lots of text

    43 %lots of text

    44 \end{mybox2}

    44 %\end{mybox2}

    45 

    45 

    46 \begin{mybox3}{Test}

    46 %\begin{mybox3}{Test}

    47 A physical explanation the \emph{dynamic matrix}\\

    47 %A physical explanation the \emph{dynamic matrix}\\

    48 lots of text

    48 %lots of text

    49 \end{mybox3}

    49 %\end{mybox3}

    50 \end{frame}

    50 %\end{frame}