Function: rnfidealtwoelt
Section: number_fields
C-Name: rnfidealtwoelement
Prototype: GG
Help: rnfidealtwoelt(rnf,x): relative version of idealtwoelt, where rnf
 is a relative numberfield.
Doc: $\var{rnf}$ being a relative
 number field extension $L/K$ as output by \kbd{rnfinit} and $x$ being an
 ideal of the relative extension $L/K$ given by a pseudo-matrix, gives a
 vector of two generators of $x$ over $\Z_L$ expressed as polmods with polmod
 coefficients.
