Re: Normalization of rational functions

["Ruud H.G. van Tol" <rvtol@isolution.nl>]

On 2023-12-04 04:39, Ilya Zakharevich wrote:
> I thought this has been fixed some time ago:
>
>     (19:36) gp > t; (-t0*t^2 + 2*t - t0)/(-t^2 - 1)
>     %1 = (-t0*t^2 + 2*t - t0)/(-t^2 - 1)
>
> Should not the normalization choose the positive sign for the
> leading(?)  coefficient of the denominator?  (Or at least the
> numerator?)

On my 2.15.4 gp-terminal:

? (-t0*t^2 + 2*t - t0)/(-t^2 - 1)
%1 = t0 + 2*t/(-t^2 - 1)


? t=x
%2 = x

? (-t0*t^2 + 2*t - t0)/(-t^2 - 1)
%3 = (-t0*x^2 + 2*x - t0)/(-x^2 - 1)

-- Ruud