Formulas.

Let $ R$ be a commutative ring with 1. We recall the algorithm for computing the inverse of a polynomial $ f \in R[x]$ modulo a power of $ x$ .



\fbox{
\begin{minipage}{10 cm}
\begin{description}
\item[{\bf Input:}] $f \in R[...
... \mod{ \ x^{2^i}} $\ \\
\> {\bf return} $g_r$\ \\
\end{tabbing}\end{minipage}}

Marc Moreno Maza
2008-01-31