Section headings

Three levels of headings are provided in REVTEX: section, subsection, and subsubsection. Precede the section heading with the \nonum command to suppress the automatic numbering; e.g.,

     \nonum\section{Introduction}

To label a section heading for cross referencing use the \label command after the heading; e.g.,

     \section{Introduction}
     \label{sec:intro}