Re: core of a negative ineteger

[Karim Belabas <Karim.Belabas@math.u-bordeaux1.fr>]

* Max Alekseyev [2012-05-24 11:05]:
> I believe that core of a negative integer should return a negative
> integer (that would match the definition of core). Currently the
> result is always positive.
> In particular, core(-1) should return -1 not 1 and core(-1,1) should
> return [-1,1].
> Don't you agree?

Indeed. I introduced this in master when fixing [#1305]

  http://pari.math.u-bordeaux.fr/cgi-bin/bugreport.cgi?bug=1305

> Currently we have:
> 
> ? core(-1)
> %1 = 1
> ? core(-1,1)
>   ***   at top-level: core(-1,1)
>   ***                 ^----------
>   *** core: negative integer in sqrtint.

Fixed in master now:

(11:37) gp > core(-1)
%1 = -1
(11:37) gp > core(-1,1)
%2 = [-1, 1]

Cheers,

    K.B.
--
Karim Belabas, IMB (UMR 5251)  Tel: (+33) (0)5 40 00 26 17
Universite Bordeaux 1          Fax: (+33) (0)5 40 00 69 50
351, cours de la Liberation    http://www.math.u-bordeaux1.fr/~belabas/
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