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Georgi Guninski on Sat, 01 Jan 2022 19:11:15 +0100
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Re: Error in qfauto() && Happy New Year
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- To: pari-dev@pari.math.u-bordeaux.fr
- Subject: Re: Error in qfauto() && Happy New Year
- From: Georgi Guninski <gguninski@gmail.com>
- Date: Sat, 1 Jan 2022 20:11:01 +0200
- Delivery-date: Sat, 01 Jan 2022 19:11:15 +0100
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- In-reply-to: <20220101153623.GA651085@math.u-bordeaux.fr>
- References: <CAGUWgD9xdKRbSXNTBK25Ddi2OBX3B2LxU+kxPeC3bk3=0k=dxQ@mail.gmail.com> <20220101153623.GA651085@math.u-bordeaux.fr>
On Sat, Jan 1, 2022 at 5:36 PM Karim Belabas
<Karim.Belabas@math.u-bordeaux.fr> wrote:
>
> Bad Input Bug: M1 must be a positive definite quadratic form, but
>
> (16:33) gp > qfsign(M1)
> %1 = [7, 3]
>
Looks like there is some protection against PD:
? M0=[1,0;0,0];qfauto(M0,M0)
*** at top-level: M0=[1,0;0,0];qfauto(M0,M0)
*** ^-------------
*** qfauto: domain error in qfisom: form is not positive definite
*** Break loop: type 'break' to go back to GP prompt
break>