Wrap the PARI library functions nf_rnfeq, eltabstorel, eltabstorel_lift and eltreltoabs. These provide a slightly lower-level interface to rnfeltabstorel and rnfeltreltoabs, and have the advantage that one can avoid initialising a full PARI rnf structure. This functionality will be used in a follow-up ticket.

Component: interfaces

Keywords: pari

Author: Peter Bruin

Branch/Commit: 5373b8e

Reviewer: Frédéric Chapoton, Jeroen Demeyer

Issue created by migration from https://trac.sagemath.org/ticket/18739