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- \subsection{ROOT\_VAL Operator}
- The {\tt ROOT\_VAL} operator takes a single univariate polynomial as
- argument, and returns a list of root values at system precision (or
- greater if required to separate roots). It is used with the syntax
- \begin{verbatim}
- ROOT_VAL(EXPRN:univariate polynomial):list.
- \end{verbatim}
- For example, the sequence
- \begin{verbatim}
- on rounded; root_val(x^3-x-1);
- \end{verbatim}
- gives the result
- \begin{verbatim}
- {0.562279512062*I - 0.662358978622, - 0.562279512062*I
- - 0.662358978622,1.32471795724}
- \end{verbatim}
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