%% Common, non-specific useful commands

\newcommand{\ie}{\textit{ie.}}
\newcommand{\eg}{\textit{eg.}}
\newcommand{\wrt}{\textit{wrt.}}

\newcommand{\set}[1]{\left\{ #1 \right\}}
\newcommand{\card}[1]{\left\vert{} #1 \right\vert}
\newcommand{\abs}[1]{\left\vert{} #1 \right\vert}