\section{EXPM1 Exponential Minus One Function}

\subsection{Usage}

Computes \verb|exp(x)-1| function accurately for \verb|x|
small.  The syntax for its use is
\begin{verbatim}
   y = expm1(x)
\end{verbatim}
where \verb|x| is an \verb|n|-dimensional array of numerical type.
