changeVariable

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changeVariable

$\begin{usage} changeVariable($L,T,\sigma,\delta$) \end{usage}$

$\begin{signatures} changeVariable: & (\%, \htmlref{\texttt{DenseMatrix}}{Dense... ...xttt{Automorphism}}{Automorphism} Q, Q $\to$\ Q) $\to$\ \%\\\end{signatures}$

where
Q == Fraction R

$\begin{params} {\em L} & \% & A system\\ {\em T} & \htmlref{\texttt{DenseMatr... ...{Fraction} R $\to$\ \htmlref{\texttt{Fraction}}{Fraction} R & \\\end{params}$

$\begin{retval} Returns a new system $\theta Z = M Z$\ equivalent to the original system $\theta Y = A Y$\ under the change of variable $Y = T Z$. \end{retval}$

Manuel Bronstein 2000-12-13