I try to write [Lavecchia et al., 2007] in a footnote like this in latex :
$\left[$Lavecchia et al., 2007$\right]$}
But I get an error :
Missing \right inserted
And I get only
[Lavecchia et al., 2007
as a result
any idea please?
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\right should only be used in the context of mathematics -- this is textual. Just say
[Lavecchia et al., 2007] (or better yet use a reference management system like BibLaTeX -- several compatible GUI options exist as well).
The error is happening because when
\left is used in the first entrance into math mode, there's no corresponding
\right (and similarly with the second entrance).