relativize in number fields is broken

[lftabera]

Does not work due to denominators:

sage: K.<a> = NumberField(x^4-4*x^3+12*x^2-16*x+8)
sage: L.<u,v> = K.relativize(3*a**3 - 9*a**2 + 24*a -16)  # OK
sage: L2.<u2,v2> = K.relativize((3/4)*a**3 - (9/4)*a**2 + 6*a -4)

Simpler example:

sage: L.<a,b> = QQ[i].relativize(1) # OK
sage: L.<a,b> = QQ[i].relativize(1/2)
...
TypeError: Unable to coerce number field defined by non-integral polynomial to PARI.

This is in some sense a duplicate of #252.

Depends on #252

Component: number fields

Keywords: relativize

Reviewer: Luis Felipe Tabera Alonso

Issue created by migration from https://trac.sagemath.org/ticket/9408

[lftabera]

comment:1

This ticket should be closed as duplicate of #252

[jdemeyer]

Dependencies: #252

[jdemeyer]

Reviewer: Luis Felipe Tabera Alonso