From mboxrd@z Thu Jan  1 00:00:00 1970
From: Francesco Turco <fturco@fastmail.fm>
Subject: Exporting math code containing a cases environment to LaTeX
Date: Sat, 12 Mar 2016 18:49:22 +0100
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Why the following piece of Org Mode document doesn't display correctly
when exported to a PDF document via LaTeX?

  \[n!=
  \begin{cases}
    1 & n=0 \\
    n(n-1)! & n\ge 1 \\
  \end{cases}
  \]

It is displayed at the left instead of center of the document.
Moreover the \[ and \] symbols are not removed in the final document.

I can fix the problem by replacing \[ and \] with \begin{displaymath}
end \end{displaymath} respectively:

  \begin{displaymath}  
  n!=
  \begin{cases}
    1 & n=0 \\
    n(n-1)! & n\ge 1 \\
  \end{cases}
  \end{displaymath}

Is this the best way to fix the problem? Am I missing a better solution?