Thank you for the pointer,
I will move the discussion there.
S.
* Nicolas M. Thiery <nicolas.thi...@u-psud.fr> [2015-11-03 17:04:31]:
> On Tue, Nov 03, 2015 at 04:37:25PM +0100, VulK wrote:
> > I just noted the following:
> >
> > sage: R = LaurentPolynomialRing(ZZ,'x,y')
> > sage: T = R.remove_var('x')
> > sage: T.inject_variables()
> > Defining y
> > sage: y in T
> > True
> > sage: y in R
> > True
> >
> > As one should expect, now for a second try
> >
> > sage: R = LaurentPolynomialRing(ZZ,'x,y,z')
> > sage: T = R.remove_var('x')
> > sage: T.inject_variables()
> > Defining y, z
> > sage: y in T
> > True
> > sage: y in R
> > False
> >
> > And of course, you try R(y), hell break loose.
> >
> > At this point, at least in my experience, there are more issues with
> > LaurentPolynomialRing than features. Is there any plan to replace the
> > implementation with something less bug ridden in the near future?
> >
> > Should I decide to invest time in rewriting it, would anyone here be
> > interested to help? Do you have any suggestion/reference on how this should
> > be done properly?
>
> Just a note: this would be better discussed on sage-devel.
>
> Cheers,
> Nicolas
> --
> Nicolas M. Thiéry "Isil" <nthi...@users.sf.net>
> http://Nicolas.Thiery.name/
>
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