\newcommand{\lc}{\color{blue} LC : }
\newcommand{\bl}[1]{{\bf \color{orange} BL: #1}}

\def\mat#1{\text{#1}}
\renewcommand{\vec}[1]{\bm{#1}}

\newcommand{\dd}{{\rm d}}

\newcommand{\erm}{{\rm erm}}
\newcommand{\logit}{{\rm logit}}
\newcommand{\affine}{{\rm affine}}
\newcommand{\constant}{{\rm constant}}

\newcommand{\lambdaerror}{\lambda_{\rm error}}
\newcommand{\lambdaloss}{\lambda_{\rm loss}}

\newcommand{\wstar}{\bm{w}_*}
\newcommand{\werm}{\bm{w}_{\erm}}
\newcommand{\ferm}{\hat{f}_{\erm}}
\newcommand{\fstar}{f_*}