\newcommand{\rotz}[1]{\begin{sideways}#1\end{sideways}}
% \rotz{vertical text}
% \rotz{\parbox{3cm}{Long header name ...}} to break a long header into several lines

\newcommand{\tuple}[1]{\langle #1\rangle}

%\DeclareMathSizes{}{}{}[}

% compressing text in papers; NB: titlesec may change capitalisation of section names
\usepackage{times}
\usepackage[small,compact]{titlesec}
