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apply


\begin{usage}
$\sigma x$\\ $\sigma(x, n)$\\
apply($\sigma$, x)\\ apply($\sigma$, x, n)
\end{usage}


Signature


\begin{params}
$\sigma$\ & \% & An automorphism of $R$\\
{\em x} & R & An ele...
...t{Integer}}{Integer} & The number of times to apply (optional)\\\end{params}

\begin{retval}
Returns $\sigma^n x$.
\end{retval}


Manuel Bronstein 2000-12-13