deletions | additions       diff --git a/Introduction.tex b/Introduction.tex  index 3ce9bc9..046b21b 100644  --- a/Introduction.tex  +++ b/Introduction.tex 
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\begin{equation}  \label{e.minimization}  \textbf{x}^\ast = \displaystyle min_{\textbf{x}\in{\cal S}}f(\textbf(x)), \min_{\textbf{x}\in{\cal S}}f(\textbf{x}),  \end{equation}  where $\textbf{x}^\ast$ stands for the best solution so far.