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apply


\begin{usage} apply(D, x)\\ apply(D, x, n)\\ D~x\\ D(x,n)\end{usage}


Signature


\begin{params} {\em D} & \% & A derivation\\ {\em x} & R & An element to diff... ...r}}{Integer} & The number of times to differentiate (optional)\\\end{params}

\begin{retval} Returns $D^n x$, {\it i.e.}~the result of applying $D$\ to $x$\ $n$\ times. \end{retval}

Manuel Bronstein 2000-12-13