deletions | additions       diff --git a/DeclareMathOperator_argmin_argmin_newcommand_reals__.tex b/DeclareMathOperator_argmin_argmin_newcommand_reals__.tex  index 50e77c3..ed527b0 100644  --- a/DeclareMathOperator_argmin_argmin_newcommand_reals__.tex  +++ b/DeclareMathOperator_argmin_argmin_newcommand_reals__.tex 
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&=& 2(\Fu m - y)^T \Fu. \nonumber  \end{eqnarray}  Lustig et al. used an a  smooth approximation of the absolute value of a complex number $x \in \complex$: \complex$, given as  \begin{equation}  |x| \approx \sqrt{x^*x + \mu}, \nonumber  \end{equation}