%% 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}

\newcommand{\tnhead}[2]{\multicolumn{1}{#1}{#2}}  % Table neutral head
\newcommand{\spaced}[2]{\hspace{#1} #2 \hspace{#1}}