Function: nfnewprec
Section: number_fields
C-Name: nfnewprec
Prototype: Gp
Help: nfnewprec(nf): transform the number field data nf into new data using
the current (usually larger) precision.
Doc: transforms the number field $\var{nf}$
into the corresponding data using current (usually larger) precision. This
function works as expected if \var{nf} is in fact a \var{bnf} or a \var{bnr}
(update structure to current precision) but may be quite slow: many
generators of principal ideals have to be computed; note that in this latter
case, the \var{bnf} must contain fundamental units.
Variant: See also \fun{GEN}{bnfnewprec}{GEN bnf, long prec} and
\fun{GEN}{bnrnewprec}{GEN bnr, long prec}.