Function: rnfalgtobasis
Section: number_fields
C-Name: rnfalgtobasis
Prototype: GG
Help: rnfalgtobasis(rnf,x): relative version of nfalgtobasis, where rnf is a
relative numberfield.
Doc: expresses $x$ on the relative
integral basis. Here, $\var{rnf}$ is a relative number field extension $L/K$
as output by \kbd{rnfinit}, and $x$ an element of $L$ in absolute form, i.e.
expressed as a polynomial or polmod with polmod coefficients, \emph{not} on
the relative integral basis.