Document Classes ⇒ beamer | Problem with two Columns

[raja]

Dear Users,

I am facing problem in achieving footnotes to the two column in latex.

Problem : left column is giving a footnote with (a) as the reference, similarly for right column also it is giving a foot note with (a).

I would like to get (a) in the left column and (b) in the right column.

Please find the code.

Code: Select all

\documentclass{beamer}

\begin{document}
  \begin{frame}
    \begin{columns}
      \begin{column}{.5\linewidth}
        \begin{block}{Some equation\footnote{this is first}}
           \begin{align*}
             a &= b \\
               &= d \\
               &= f
           \end{align*}
        \end{block}
      \end{column}
      \begin{column}{.5\linewidth}
        \begin{tabular}{cc}\hline
          some text & some text \footnote{this is second} \\\hline
        \end{tabular}
      \end{column}
    \end{columns}
  \end{frame}
\end{document}