| Karim Belabas on Sun, 11 May 2014 14:25:58 +0200 |
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| Re: More thue() troubles in master/2.5.5 after the roots patch |
* Georgi Guninski [2014-05-11 13:00]:
> This appears an ``issue'' to me on today master
> and 2.5.5
>
> ? F=(2*x^3+2*y^3)^3*(3*x+3*y)^3;th=thueinit(subst(F,y,1),1);so=thue(th,subst(subst(F,x,2),y,1))
> %23 = [[2, 1], [1, 2]]
> ? subst(subst(F,x,-2),y,-1)
> %24 = 4251528
> ? subst(subst(F,x,2),y,1)
> %25 = 4251528
> ? %25==%24
> %26 = 1
>
> [-2,-1] and the like are missing IMHO.
They are. :-(
In fact thue(f^e*g,...), (f,g)=1, e even, where f irreducible and
deg f <= min{deg P : P | g}
missed solutions such that f < 0.
Fixed in master.
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/~kbelabas/
F-33405 Talence (France) http://pari.math.u-bordeaux1.fr/ [PARI/GP]
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