

\newcommand{\sgn}{\mathop{\rm sgn}\nolimits}
\DeclareMathOperator*{\argmax}{arg\,max}
\DeclareMathOperator*{\argmin}{arg\,min}

\newcommand{\diag}{\mathop{\rm diag}}

\newcommand{\Eqref}[1]{{(\ref{#1})}}

\newcommand{\bzero}{{\mathbf 0}}
\newcommand{\bA}{{\mathbf A}}
\newcommand{\bff}{{\mathbf f}}
\newcommand{\bh}{{\mathbf h}}
\newcommand{\bI}{{\mathbf I}}
\newcommand{\bn}{{\mathbf n}}
\newcommand{\bT}{{\mathbf T}}
\newcommand{\bv}{{\mathbf v}}
\newcommand{\bw}{{\mathbf w}}
\newcommand{\bx}{{\mathbf x}}
\newcommand{\bz}{{\mathbf z}}

\newcommand{\bOmega}{{\mathbf\Omega}}

\newcommand{\N}{{\mathbb N}}
\newcommand{\R}{{\mathbb R}}
\newcommand{\C}{{\mathbb C}}
\newcommand{\Z}{{\mathbb Z}}

\renewcommand{\Re}[1]{\hbox{Re}\left[{#1}\right]}
\renewcommand{\Im}[1]{\hbox{Im}\left[{#1}\right]}

\newcommand{\cvmatrix}{{\left[\begin{array}{*2{c}}1&\Delta\\0&1\end{array}\right]}}

