      \fitem{slice}{(t:tab, n:numeric, m:numeric)} gives the elements of
      \code{t} of indices between \code{n} included up to \code{m}
      excluded. If \code{n > m} the element are given in reverse
      order. So
      \begin{lstlisting}
            @slide(t, @size(t), 0) 
      \end{lstlisting}
      is equivalent to
      \begin{lstlisting}
            @reverse(t)
      \end{lstlisting}
      See also functions \acode{cdr}, \acode{drop} and \acode{take}.




      %%% -------------------------------------------------------

