\(
\newcommand{\bm}[1]{\boldsymbol{#1}}
\newcommand{\textm}[1]{\textsf{#1}}
\def\T{{\mkern-2mu\raise-1mu\mathsf{T}}}
\newcommand{\R}{\mathbb{R}} % real numbers
\newcommand{\E}{{\rm I\kern-.2em E}}
\newcommand{\w}{\bm{w}} % bold w
\newcommand{\bmu}{\bm{\mu}} % bold mu
\newcommand{\bSigma}{\bm{\Sigma}} % bold mu
\newcommand{\bigO}{O} %\mathcal{O}
\renewcommand{\d}[1]{\operatorname{d}\!{#1}}
\)
