[GiNaC-devel] Sqrfree_parfrac Issue GiNaC

[Vladimir V. Kisil]

Dear Richard,

I see your point, this can be indeed a better way. However, I am a bit far from the polynomial arithmetic to make a specific suggestion here.

Best wishes,
Vladimir

________________________________________
From: GiNaC-devel <ginac-devel-bounces at ginac.de> on behalf of Richard B. Kreckel <kreckel at in.terlu.de>
Sent: 02 August 2020 17:59
To: ginac-devel at ginac.de
Subject: Re: [GiNaC-devel] Sqrfree_parfrac Issue GiNaC

Hi,

On 24.07.20 00:08, Vladimir V. Kisil wrote:
> Many thanks for reporting the bug with a detailed description. I am attaching a patch to fix it.

I've applied the patch (as you've surely noticed, Vladimir).

However, I am beginning to think that it is best to fix sqrfree_yun such
that no external workarounds are necessary.

It's a little bit tricky: The sign seems to get lost in the content part
of the input polynomial. (Remember that it may itself be a polynomial in
other variables.) And the unit part is not deterministic for
multivariate polynomials. I'm working on a patch.

   -richard.
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